[INFO] cloning repository https://github.com/kkspeed/metal-placebo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kkspeed/metal-placebo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkkspeed%2Fmetal-placebo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkkspeed%2Fmetal-placebo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 63665057c8369a620fb33fc8d85c1c99a3de81ea
[INFO] testing kkspeed/metal-placebo against 1.75.0 for beta-1.76-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkkspeed%2Fmetal-placebo" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kkspeed/metal-placebo on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kkspeed/metal-placebo
[INFO] finished tweaking git repo https://github.com/kkspeed/metal-placebo
[INFO] tweaked toml for git repo https://github.com/kkspeed/metal-placebo written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kkspeed/metal-placebo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linked-hash-map v0.3.0
[INFO] [stderr]   Downloaded time v0.1.35
[INFO] [stderr]   Downloaded unreachable v0.1.1
[INFO] [stderr]   Downloaded antidote v1.0.0
[INFO] [stderr]   Downloaded num-integer v0.1.32
[INFO] [stderr]   Downloaded ordered-float v0.2.3
[INFO] [stderr]   Downloaded serde_yaml v0.5.0
[INFO] [stderr]   Downloaded yaml-rust v0.3.5
[INFO] [stderr]   Downloaded libc v0.2.19
[INFO] [stderr]   Downloaded log4rs v0.5.2
[INFO] [stderr]   Downloaded rustc-serialize v0.3.22
[INFO] [stderr]   Downloaded chrono v0.2.25
[INFO] [stderr]   Downloaded toml v0.2.1
[INFO] [stderr]   Downloaded serde_test v0.8.22
[INFO] [stderr]   Downloaded serde-value v0.3.1
[INFO] [stderr]   Downloaded error-chain v0.7.2
[INFO] [stderr]   Downloaded serde v0.8.22
[INFO] [stderr]   Downloaded pkg-config v0.3.8
[INFO] [stderr]   Downloaded log-mdc v0.1.0
[INFO] [stderr]   Downloaded num v0.1.36
[INFO] [stderr]   Downloaded quick-error v1.1.0
[INFO] [stderr]   Downloaded humantime v1.0.0
[INFO] [stderr]   Downloaded num-traits v0.1.36
[INFO] [stderr]   Downloaded mustache v0.8.0
[INFO] [stderr]   Downloaded log v0.3.6
[INFO] [stderr]   Downloaded metadeps v1.1.1
[INFO] [stderr]   Downloaded fnv v1.0.5
[INFO] [stderr]   Downloaded unsafe-any v0.4.1
[INFO] [stderr]   Downloaded traitobject v0.0.3
[INFO] [stderr]   Downloaded num-iter v0.1.32
[INFO] [stderr]   Downloaded x11 v2.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8c9506cce46dac547db580d09c03e41b225bfa3d4b88d79ecc7f071e9039799
[INFO] running `Command { std: "docker" "start" "-a" "a8c9506cce46dac547db580d09c03e41b225bfa3d4b88d79ecc7f071e9039799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8c9506cce46dac547db580d09c03e41b225bfa3d4b88d79ecc7f071e9039799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8c9506cce46dac547db580d09c03e41b225bfa3d4b88d79ecc7f071e9039799", kill_on_drop: false }`
[INFO] [stdout] a8c9506cce46dac547db580d09c03e41b225bfa3d4b88d79ecc7f071e9039799
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09633a65d3bd5941315dffdf353aa7985940ef433c23fd5d1dd9d114069b4737
[INFO] running `Command { std: "docker" "start" "-a" "09633a65d3bd5941315dffdf353aa7985940ef433c23fd5d1dd9d114069b4737", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.1.36
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling serde v0.8.22
[INFO] [stderr]    Compiling error-chain v0.7.2
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.8
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling libc v0.2.19
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling traitobject v0.0.3
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling quick-error v1.1.0
[INFO] [stderr]    Compiling unsafe-any v0.4.1
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling metadeps v1.1.1
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling humantime v1.0.0
[INFO] [stderr]    Compiling time v0.1.35
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling num-integer v0.1.32
[INFO] [stderr]    Compiling ordered-float v0.2.3
[INFO] [stderr]    Compiling antidote v1.0.0
[INFO] [stderr]    Compiling fnv v1.0.5
[INFO] [stderr]    Compiling num-iter v0.1.32
[INFO] [stderr]    Compiling log-mdc v0.1.0
[INFO] [stderr]    Compiling x11 v2.12.0
[INFO] [stderr]    Compiling num v0.1.36
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling serde_test v0.8.22
[INFO] [stderr]    Compiling serde-value v0.3.1
[INFO] [stderr]    Compiling linked-hash-map v0.3.0
[INFO] [stderr]    Compiling yaml-rust v0.3.5
[INFO] [stderr]    Compiling mustache v0.8.0
[INFO] [stderr]    Compiling serde_yaml v0.5.0
[INFO] [stderr]    Compiling log4rs v0.5.2
[INFO] [stderr]    Compiling rswm v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/util.rs:57:24
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stdout]    |                        ^           ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 57 -     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stdout] 57 +     let mut list: *mut *mut c_char = unsafe { zeroed() };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Cow`
[INFO] [stdout]  --> src/client.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FullScreen`, `Overview`
[INFO] [stdout]   --> src/core.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 | use layout::{FullScreen, Layout, Overview, Tile};
[INFO] [stdout]    |              ^^^^^^^^^^          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ClientL`
[INFO] [stdout]  --> src/config.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 | use client::{ClientL, ClientW};
[INFO] [stdout]   |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mustache::MapBuilder`
[INFO] [stdout]  --> src/loggers.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use mustache::MapBuilder;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/layout.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/workspace.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `c_int`
[INFO] [stdout]  --> src/workspace.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::os::raw::{c_int, c_uchar, c_uint};
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!(child.wait());
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         try!(child.stdout.unwrap().read_to_string(&mut result));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut child = try!(process::Command::new("dmenu")
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             try!(writeln!(child.stdin.as_mut().unwrap(), "{}", c));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/core.rs:122:17
[INFO] [stdout]     |
[INFO] [stdout] 122 |     logger: Box<Logger + 'static>,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 122 |     logger: Box<dyn Logger + 'static>,
[INFO] [stdout]     |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type WmAction = Box<Fn(&mut WindowManager)>;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type WmAction = Box<dyn Fn(&mut WindowManager)>;
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:23:32
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub type ClientPredicate = Box<Fn(&ClientW) -> bool>;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub type ClientPredicate = Box<dyn Fn(&ClientW) -> bool>;
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:24:29
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type ClientAction = Box<Fn(&mut ClientW)>;
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type ClientAction = Box<dyn Fn(&mut ClientW)>;
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:25:28
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub type StartAction = Box<Fn()>;
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub type StartAction = Box<dyn Fn()>;
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:42:39
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub tag_layout: Vec<(c_uchar, Box<Layout + 'static>)>,
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub tag_layout: Vec<(c_uchar, Box<dyn Layout + 'static>)>,
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/layout.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub layout: Box<Layout>,
[INFO] [stdout]     |                     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub layout: Box<dyn Layout>,
[INFO] [stdout]     |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/workspace.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |     layout: Box<Layout + 'static>,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 |     layout: Box<dyn Layout + 'static>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:365:20
[INFO] [stdout]     |
[INFO] [stdout] 365 |     prev_iter: Box<Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 365 |     prev_iter: Box<dyn Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:366:20
[INFO] [stdout]     |
[INFO] [stdout] 366 |     next_iter: Box<Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 366 |     next_iter: Box<dyn Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:385:20
[INFO] [stdout]     |
[INFO] [stdout] 385 |     prev_iter: Box<Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 385 |     prev_iter: Box<dyn Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:386:20
[INFO] [stdout]     |
[INFO] [stdout] 386 |     next_iter: Box<Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 386 |     next_iter: Box<dyn Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:589:35
[INFO] [stdout]     |
[INFO] [stdout] 589 |                       predicate: &Fn(&Self::Item) -> bool,
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 589 |                       predicate: &dyn Fn(&Self::Item) -> bool,
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:591:36
[INFO] [stdout]     |
[INFO] [stdout] 591 |                       yes_action: &Fn(&mut Self::Item),
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 591 |                       yes_action: &dyn Fn(&mut Self::Item),
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:592:35
[INFO] [stdout]     |
[INFO] [stdout] 592 |                       no_action: &Fn(&mut Self::Item))
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 592 |                       no_action: &dyn Fn(&mut Self::Item))
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:619:35
[INFO] [stdout]     |
[INFO] [stdout] 619 |                       predicate: &Fn(&ClientW) -> bool,
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 619 |                       predicate: &dyn Fn(&ClientW) -> bool,
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:621:36
[INFO] [stdout]     |
[INFO] [stdout] 621 |                       yes_action: &Fn(&mut ClientW),
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 621 |                       yes_action: &dyn Fn(&mut ClientW),
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:622:35
[INFO] [stdout]     |
[INFO] [stdout] 622 |                       no_action: &Fn(&mut ClientW))
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 622 |                       no_action: &dyn Fn(&mut ClientW))
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/core.rs:23:59
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn lookup_layout(config: Rc<Config>, tag: c_uchar) -> Box<Layout + 'static> {
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn lookup_layout(config: Rc<Config>, tag: c_uchar) -> Box<dyn Layout + 'static> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/core.rs:318:46
[INFO] [stdout]     |
[INFO] [stdout] 318 |     pub fn set_logger(&mut self, logger: Box<Logger + 'static>) {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 318 |     pub fn set_logger(&mut self, logger: Box<dyn Logger + 'static>) {
[INFO] [stdout]     |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/config.rs:175:59
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn tag_layout(mut self, layout: Vec<(c_uchar, Box<Layout + 'static>)>) -> Config {
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn tag_layout(mut self, layout: Vec<(c_uchar, Box<dyn Layout + 'static>)>) -> Config {
[INFO] [stdout]     |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:27:20
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Clone for Box<Layout> {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Clone for Box<dyn Layout> {
[INFO] [stdout]    |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn clone_layout(&self) -> Box<Layout>;
[INFO] [stdout]    |                                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn clone_layout(&self) -> Box<dyn Layout>;
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:22:35
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn clone_layout(&self) -> Box<Layout> {
[INFO] [stdout]    |                                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn clone_layout(&self) -> Box<dyn Layout> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:28:28
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn clone(&self) -> Box<Layout> {
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn clone(&self) -> Box<dyn Layout> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/workspace.rs:38:21
[INFO] [stdout]    |
[INFO] [stdout] 38 |         layout: Box<Layout + 'static>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |         layout: Box<dyn Layout + 'static>,
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:252:41
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn select_clients(&self, pred: &Fn(&ClientW) -> bool) -> Vec<ClientW> {
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn select_clients(&self, pred: &dyn Fn(&ClientW) -> bool) -> Vec<ClientW> {
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/core.rs:865:17
[INFO] [stdout]     |
[INFO] [stdout] 865 |         for (_, mut w) in self.workspaces.iter_mut() {
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]     --> src/core.rs:1106:36
[INFO] [stdout]      |
[INFO] [stdout] 1106 |     fn on_expose_notify(&mut self, event: xlib::XExposeEvent) {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]     --> src/core.rs:1176:36
[INFO] [stdout]      |
[INFO] [stdout] 1176 |     fn on_motion_notify(&mut self, event: xlib::XMotionEvent) {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]     --> src/core.rs:1187:25
[INFO] [stdout]      |
[INFO] [stdout] 1187 |                     let tag = c.tag();
[INFO] [stdout]      |                         ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/core.rs:1181:21
[INFO] [stdout]      |
[INFO] [stdout] 1181 |         if let Some(mut c) = self.get_client_by_window(event.window).as_mut() {
[INFO] [stdout]      |                     ----^
[INFO] [stdout]      |                     |
[INFO] [stdout]      |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]   --> src/config.rs:50:53
[INFO] [stdout]    |
[INFO] [stdout] 50 |             vec![(mod_mask, keysym::XK_q, Box::new(|w| process::exit(0))),
[INFO] [stdout]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `global_config`
[INFO] [stdout]    --> src/loggers.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |             global_config: &Config,
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_global_config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/layout.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn post(&self, message: &str, window_manager: &mut core::WindowManager) {}
[INFO] [stdout]    |                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `window_manager`
[INFO] [stdout]   --> src/layout.rs:12:35
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn post(&self, message: &str, window_manager: &mut core::WindowManager) {}
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_window_manager`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]   --> src/layout.rs:91:28
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn layout_rects(&self, config: Rc<Config>, n: usize, rect: Rect) -> Vec<Rect> {
[INFO] [stdout]    |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `anchor_window`, `is_dialog`, and `old_border` are never read
[INFO] [stdout]   --> src/client.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Client {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 63 |     anchor_window: xlib::Window,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     is_dialog: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88 |     old_border: c_int,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TRACE` is never used
[INFO] [stdout]   --> src/core.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const TRACE: bool = true;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek` is never used
[INFO] [stdout]   --> src/core.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl BackStack {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn peek(&self) -> Option<&ClientW> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `screen` is never read
[INFO] [stdout]    --> src/core.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub struct WindowManager {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 113 |     screen: c_int,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `current_returned` is never read
[INFO] [stdout]    --> src/workspace.rs:367:5
[INFO] [stdout]     |
[INFO] [stdout] 363 | pub struct WSIter<'a> {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 367 |     current_returned: bool,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `net_wm_state_sticky` is never used
[INFO] [stdout]   --> src/atoms.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn net_wm_state_sticky() -> xlib::Atom {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/loggers.rs:173:9
[INFO] [stdout]     |
[INFO] [stdout] 173 | /         write!(self.child.stdin.as_mut().unwrap(),
[INFO] [stdout] 174 | |                "{}",
[INFO] [stdout] 175 | |                self.config.separator);
[INFO] [stdout]     | |_____________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/loggers.rs:196:9
[INFO] [stdout]     |
[INFO] [stdout] 196 |         write!(self.child.stdin.as_mut().unwrap(), "\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]    --> src/atoms.rs:152:69
[INFO] [stdout]     |
[INFO] [stdout] 152 |     unsafe { xlib::XInternAtom(display, CString::new(atom).unwrap().as_ptr(), 0) }
[INFO] [stdout]     |                                         --------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]     |                                         |
[INFO] [stdout]     |                                         this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]     |
[INFO] [stdout]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout]     = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 58 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rswm::client::ClientW`
[INFO] [stdout]   --> main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use rswm::client::ClientW;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Layout`, `Tile`
[INFO] [stdout]   --> main.rs:17:20
[INFO] [stdout]    |
[INFO] [stdout] 17 | use rswm::layout::{Tile, Tile13, FullScreen, Overview, Layout};
[INFO] [stdout]    |                    ^^^^                                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.01s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.22, traitobject v0.0.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "09633a65d3bd5941315dffdf353aa7985940ef433c23fd5d1dd9d114069b4737", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09633a65d3bd5941315dffdf353aa7985940ef433c23fd5d1dd9d114069b4737", kill_on_drop: false }`
[INFO] [stdout] 09633a65d3bd5941315dffdf353aa7985940ef433c23fd5d1dd9d114069b4737
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9fc0c72f5f9ca7433822cccf3dd08708b690b22220735c32bdd68afc746b7f1
[INFO] running `Command { std: "docker" "start" "-a" "e9fc0c72f5f9ca7433822cccf3dd08708b690b22220735c32bdd68afc746b7f1", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/util.rs:57:24
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stdout]    |                        ^           ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 57 -     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stdout] 57 +     let mut list: *mut *mut c_char = unsafe { zeroed() };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Cow`
[INFO] [stdout]  --> src/client.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FullScreen`, `Overview`
[INFO] [stdout]   --> src/core.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 | use layout::{FullScreen, Layout, Overview, Tile};
[INFO] [stdout]    |              ^^^^^^^^^^          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ClientL`
[INFO] [stdout]  --> src/config.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 | use client::{ClientL, ClientW};
[INFO] [stdout]   |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mustache::MapBuilder`
[INFO] [stdout]  --> src/loggers.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use mustache::MapBuilder;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/layout.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/workspace.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `c_int`
[INFO] [stdout]  --> src/workspace.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::os::raw::{c_int, c_uchar, c_uint};
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!(child.wait());
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         try!(child.stdout.unwrap().read_to_string(&mut result));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut child = try!(process::Command::new("dmenu")
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             try!(writeln!(child.stdin.as_mut().unwrap(), "{}", c));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/core.rs:122:17
[INFO] [stdout]     |
[INFO] [stdout] 122 |     logger: Box<Logger + 'static>,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 122 |     logger: Box<dyn Logger + 'static>,
[INFO] [stdout]     |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type WmAction = Box<Fn(&mut WindowManager)>;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type WmAction = Box<dyn Fn(&mut WindowManager)>;
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:23:32
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub type ClientPredicate = Box<Fn(&ClientW) -> bool>;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub type ClientPredicate = Box<dyn Fn(&ClientW) -> bool>;
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:24:29
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type ClientAction = Box<Fn(&mut ClientW)>;
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type ClientAction = Box<dyn Fn(&mut ClientW)>;
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:25:28
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub type StartAction = Box<Fn()>;
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub type StartAction = Box<dyn Fn()>;
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:42:39
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub tag_layout: Vec<(c_uchar, Box<Layout + 'static>)>,
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub tag_layout: Vec<(c_uchar, Box<dyn Layout + 'static>)>,
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/layout.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub layout: Box<Layout>,
[INFO] [stdout]     |                     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub layout: Box<dyn Layout>,
[INFO] [stdout]     |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/workspace.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |     layout: Box<Layout + 'static>,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 |     layout: Box<dyn Layout + 'static>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:365:20
[INFO] [stdout]     |
[INFO] [stdout] 365 |     prev_iter: Box<Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 365 |     prev_iter: Box<dyn Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:366:20
[INFO] [stdout]     |
[INFO] [stdout] 366 |     next_iter: Box<Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 366 |     next_iter: Box<dyn Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:385:20
[INFO] [stdout]     |
[INFO] [stdout] 385 |     prev_iter: Box<Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 385 |     prev_iter: Box<dyn Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:386:20
[INFO] [stdout]     |
[INFO] [stdout] 386 |     next_iter: Box<Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 386 |     next_iter: Box<dyn Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:589:35
[INFO] [stdout]     |
[INFO] [stdout] 589 |                       predicate: &Fn(&Self::Item) -> bool,
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 589 |                       predicate: &dyn Fn(&Self::Item) -> bool,
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:591:36
[INFO] [stdout]     |
[INFO] [stdout] 591 |                       yes_action: &Fn(&mut Self::Item),
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 591 |                       yes_action: &dyn Fn(&mut Self::Item),
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:592:35
[INFO] [stdout]     |
[INFO] [stdout] 592 |                       no_action: &Fn(&mut Self::Item))
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 592 |                       no_action: &dyn Fn(&mut Self::Item))
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:619:35
[INFO] [stdout]     |
[INFO] [stdout] 619 |                       predicate: &Fn(&ClientW) -> bool,
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 619 |                       predicate: &dyn Fn(&ClientW) -> bool,
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:621:36
[INFO] [stdout]     |
[INFO] [stdout] 621 |                       yes_action: &Fn(&mut ClientW),
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 621 |                       yes_action: &dyn Fn(&mut ClientW),
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:622:35
[INFO] [stdout]     |
[INFO] [stdout] 622 |                       no_action: &Fn(&mut ClientW))
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 622 |                       no_action: &dyn Fn(&mut ClientW))
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/core.rs:23:59
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn lookup_layout(config: Rc<Config>, tag: c_uchar) -> Box<Layout + 'static> {
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn lookup_layout(config: Rc<Config>, tag: c_uchar) -> Box<dyn Layout + 'static> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/core.rs:318:46
[INFO] [stdout]     |
[INFO] [stdout] 318 |     pub fn set_logger(&mut self, logger: Box<Logger + 'static>) {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 318 |     pub fn set_logger(&mut self, logger: Box<dyn Logger + 'static>) {
[INFO] [stdout]     |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/config.rs:175:59
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn tag_layout(mut self, layout: Vec<(c_uchar, Box<Layout + 'static>)>) -> Config {
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn tag_layout(mut self, layout: Vec<(c_uchar, Box<dyn Layout + 'static>)>) -> Config {
[INFO] [stdout]     |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:27:20
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Clone for Box<Layout> {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Clone for Box<dyn Layout> {
[INFO] [stdout]    |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn clone_layout(&self) -> Box<Layout>;
[INFO] [stdout]    |                                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn clone_layout(&self) -> Box<dyn Layout>;
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:22:35
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn clone_layout(&self) -> Box<Layout> {
[INFO] [stdout]    |                                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn clone_layout(&self) -> Box<dyn Layout> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:28:28
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn clone(&self) -> Box<Layout> {
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn clone(&self) -> Box<dyn Layout> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/workspace.rs:38:21
[INFO] [stdout]    |
[INFO] [stdout] 38 |         layout: Box<Layout + 'static>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |         layout: Box<dyn Layout + 'static>,
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:252:41
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn select_clients(&self, pred: &Fn(&ClientW) -> bool) -> Vec<ClientW> {
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn select_clients(&self, pred: &dyn Fn(&ClientW) -> bool) -> Vec<ClientW> {
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/core.rs:865:17
[INFO] [stdout]     |
[INFO] [stdout] 865 |         for (_, mut w) in self.workspaces.iter_mut() {
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]     --> src/core.rs:1106:36
[INFO] [stdout]      |
[INFO] [stdout] 1106 |     fn on_expose_notify(&mut self, event: xlib::XExposeEvent) {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]     --> src/core.rs:1176:36
[INFO] [stdout]      |
[INFO] [stdout] 1176 |     fn on_motion_notify(&mut self, event: xlib::XMotionEvent) {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]     --> src/core.rs:1187:25
[INFO] [stdout]      |
[INFO] [stdout] 1187 |                     let tag = c.tag();
[INFO] [stdout]      |                         ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/core.rs:1181:21
[INFO] [stdout]      |
[INFO] [stdout] 1181 |         if let Some(mut c) = self.get_client_by_window(event.window).as_mut() {
[INFO] [stdout]      |                     ----^
[INFO] [stdout]      |                     |
[INFO] [stdout]      |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]   --> src/config.rs:50:53
[INFO] [stdout]    |
[INFO] [stdout] 50 |             vec![(mod_mask, keysym::XK_q, Box::new(|w| process::exit(0))),
[INFO] [stdout]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `global_config`
[INFO] [stdout]    --> src/loggers.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |             global_config: &Config,
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_global_config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/layout.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn post(&self, message: &str, window_manager: &mut core::WindowManager) {}
[INFO] [stdout]    |                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `window_manager`
[INFO] [stdout]   --> src/layout.rs:12:35
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn post(&self, message: &str, window_manager: &mut core::WindowManager) {}
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_window_manager`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]   --> src/layout.rs:91:28
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn layout_rects(&self, config: Rc<Config>, n: usize, rect: Rect) -> Vec<Rect> {
[INFO] [stdout]    |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `anchor_window`, `is_dialog`, and `old_border` are never read
[INFO] [stdout]   --> src/client.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Client {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 63 |     anchor_window: xlib::Window,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     is_dialog: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88 |     old_border: c_int,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TRACE` is never used
[INFO] [stdout]   --> src/core.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const TRACE: bool = true;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek` is never used
[INFO] [stdout]   --> src/core.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl BackStack {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn peek(&self) -> Option<&ClientW> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `screen` is never read
[INFO] [stdout]    --> src/core.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub struct WindowManager {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 113 |     screen: c_int,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `current_returned` is never read
[INFO] [stdout]    --> src/workspace.rs:367:5
[INFO] [stdout]     |
[INFO] [stdout] 363 | pub struct WSIter<'a> {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 367 |     current_returned: bool,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `net_wm_state_sticky` is never used
[INFO] [stdout]   --> src/atoms.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn net_wm_state_sticky() -> xlib::Atom {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/loggers.rs:173:9
[INFO] [stdout]     |
[INFO] [stdout] 173 | /         write!(self.child.stdin.as_mut().unwrap(),
[INFO] [stdout] 174 | |                "{}",
[INFO] [stdout] 175 | |                self.config.separator);
[INFO] [stdout]     | |_____________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/loggers.rs:196:9
[INFO] [stdout]     |
[INFO] [stdout] 196 |         write!(self.child.stdin.as_mut().unwrap(), "\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]    --> src/atoms.rs:152:69
[INFO] [stdout]     |
[INFO] [stdout] 152 |     unsafe { xlib::XInternAtom(display, CString::new(atom).unwrap().as_ptr(), 0) }
[INFO] [stdout]     |                                         --------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]     |                                         |
[INFO] [stdout]     |                                         this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]     |
[INFO] [stdout]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout]     = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 58 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rswm v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rswm::client::ClientW`
[INFO] [stdout]   --> main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use rswm::client::ClientW;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Layout`, `Tile`
[INFO] [stdout]   --> main.rs:17:20
[INFO] [stdout]    |
[INFO] [stdout] 17 | use rswm::layout::{Tile, Tile13, FullScreen, Overview, Layout};
[INFO] [stdout]    |                    ^^^^                                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/util.rs:57:24
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stdout]    |                        ^           ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 57 -     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stdout] 57 +     let mut list: *mut *mut c_char = unsafe { zeroed() };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Cow`
[INFO] [stdout]  --> src/client.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FullScreen`, `Overview`
[INFO] [stdout]   --> src/core.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 | use layout::{FullScreen, Layout, Overview, Tile};
[INFO] [stdout]    |              ^^^^^^^^^^          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ClientL`
[INFO] [stdout]  --> src/config.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 | use client::{ClientL, ClientW};
[INFO] [stdout]   |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mustache::MapBuilder`
[INFO] [stdout]  --> src/loggers.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use mustache::MapBuilder;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/layout.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/workspace.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `c_int`
[INFO] [stdout]  --> src/workspace.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::os::raw::{c_int, c_uchar, c_uint};
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         try!(child.wait());
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         try!(child.stdout.unwrap().read_to_string(&mut result));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut child = try!(process::Command::new("dmenu")
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/prompt.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             try!(writeln!(child.stdin.as_mut().unwrap(), "{}", c));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/core.rs:122:17
[INFO] [stdout]     |
[INFO] [stdout] 122 |     logger: Box<Logger + 'static>,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 122 |     logger: Box<dyn Logger + 'static>,
[INFO] [stdout]     |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type WmAction = Box<Fn(&mut WindowManager)>;
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type WmAction = Box<dyn Fn(&mut WindowManager)>;
[INFO] [stdout]    |                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:23:32
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub type ClientPredicate = Box<Fn(&ClientW) -> bool>;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub type ClientPredicate = Box<dyn Fn(&ClientW) -> bool>;
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:24:29
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type ClientAction = Box<Fn(&mut ClientW)>;
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type ClientAction = Box<dyn Fn(&mut ClientW)>;
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:25:28
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub type StartAction = Box<Fn()>;
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub type StartAction = Box<dyn Fn()>;
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/config.rs:42:39
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub tag_layout: Vec<(c_uchar, Box<Layout + 'static>)>,
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub tag_layout: Vec<(c_uchar, Box<dyn Layout + 'static>)>,
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/layout.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub layout: Box<Layout>,
[INFO] [stdout]     |                     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub layout: Box<dyn Layout>,
[INFO] [stdout]     |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/workspace.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |     layout: Box<Layout + 'static>,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 |     layout: Box<dyn Layout + 'static>,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:365:20
[INFO] [stdout]     |
[INFO] [stdout] 365 |     prev_iter: Box<Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 365 |     prev_iter: Box<dyn Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:366:20
[INFO] [stdout]     |
[INFO] [stdout] 366 |     next_iter: Box<Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 366 |     next_iter: Box<dyn Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:385:20
[INFO] [stdout]     |
[INFO] [stdout] 385 |     prev_iter: Box<Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 385 |     prev_iter: Box<dyn Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:386:20
[INFO] [stdout]     |
[INFO] [stdout] 386 |     next_iter: Box<Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 386 |     next_iter: Box<dyn Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:589:35
[INFO] [stdout]     |
[INFO] [stdout] 589 |                       predicate: &Fn(&Self::Item) -> bool,
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 589 |                       predicate: &dyn Fn(&Self::Item) -> bool,
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:591:36
[INFO] [stdout]     |
[INFO] [stdout] 591 |                       yes_action: &Fn(&mut Self::Item),
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 591 |                       yes_action: &dyn Fn(&mut Self::Item),
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:592:35
[INFO] [stdout]     |
[INFO] [stdout] 592 |                       no_action: &Fn(&mut Self::Item))
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 592 |                       no_action: &dyn Fn(&mut Self::Item))
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:619:35
[INFO] [stdout]     |
[INFO] [stdout] 619 |                       predicate: &Fn(&ClientW) -> bool,
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 619 |                       predicate: &dyn Fn(&ClientW) -> bool,
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:621:36
[INFO] [stdout]     |
[INFO] [stdout] 621 |                       yes_action: &Fn(&mut ClientW),
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 621 |                       yes_action: &dyn Fn(&mut ClientW),
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client.rs:622:35
[INFO] [stdout]     |
[INFO] [stdout] 622 |                       no_action: &Fn(&mut ClientW))
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 622 |                       no_action: &dyn Fn(&mut ClientW))
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/core.rs:23:59
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn lookup_layout(config: Rc<Config>, tag: c_uchar) -> Box<Layout + 'static> {
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn lookup_layout(config: Rc<Config>, tag: c_uchar) -> Box<dyn Layout + 'static> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/core.rs:318:46
[INFO] [stdout]     |
[INFO] [stdout] 318 |     pub fn set_logger(&mut self, logger: Box<Logger + 'static>) {
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 318 |     pub fn set_logger(&mut self, logger: Box<dyn Logger + 'static>) {
[INFO] [stdout]     |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/config.rs:175:59
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn tag_layout(mut self, layout: Vec<(c_uchar, Box<Layout + 'static>)>) -> Config {
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 175 |     pub fn tag_layout(mut self, layout: Vec<(c_uchar, Box<dyn Layout + 'static>)>) -> Config {
[INFO] [stdout]     |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:27:20
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Clone for Box<Layout> {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Clone for Box<dyn Layout> {
[INFO] [stdout]    |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn clone_layout(&self) -> Box<Layout>;
[INFO] [stdout]    |                                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn clone_layout(&self) -> Box<dyn Layout>;
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:22:35
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn clone_layout(&self) -> Box<Layout> {
[INFO] [stdout]    |                                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn clone_layout(&self) -> Box<dyn Layout> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/layout.rs:28:28
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn clone(&self) -> Box<Layout> {
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn clone(&self) -> Box<dyn Layout> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/workspace.rs:38:21
[INFO] [stdout]    |
[INFO] [stdout] 38 |         layout: Box<Layout + 'static>,
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |         layout: Box<dyn Layout + 'static>,
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/workspace.rs:252:41
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn select_clients(&self, pred: &Fn(&ClientW) -> bool) -> Vec<ClientW> {
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 252 |     pub fn select_clients(&self, pred: &dyn Fn(&ClientW) -> bool) -> Vec<ClientW> {
[INFO] [stdout]     |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/core.rs:865:17
[INFO] [stdout]     |
[INFO] [stdout] 865 |         for (_, mut w) in self.workspaces.iter_mut() {
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]     --> src/core.rs:1106:36
[INFO] [stdout]      |
[INFO] [stdout] 1106 |     fn on_expose_notify(&mut self, event: xlib::XExposeEvent) {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]     --> src/core.rs:1176:36
[INFO] [stdout]      |
[INFO] [stdout] 1176 |     fn on_motion_notify(&mut self, event: xlib::XMotionEvent) {
[INFO] [stdout]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tag`
[INFO] [stdout]     --> src/core.rs:1187:25
[INFO] [stdout]      |
[INFO] [stdout] 1187 |                     let tag = c.tag();
[INFO] [stdout]      |                         ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/core.rs:1181:21
[INFO] [stdout]      |
[INFO] [stdout] 1181 |         if let Some(mut c) = self.get_client_by_window(event.window).as_mut() {
[INFO] [stdout]      |                     ----^
[INFO] [stdout]      |                     |
[INFO] [stdout]      |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `w`
[INFO] [stdout]   --> src/config.rs:50:53
[INFO] [stdout]    |
[INFO] [stdout] 50 |             vec![(mod_mask, keysym::XK_q, Box::new(|w| process::exit(0))),
[INFO] [stdout]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `global_config`
[INFO] [stdout]    --> src/loggers.rs:128:13
[INFO] [stdout]     |
[INFO] [stdout] 128 |             global_config: &Config,
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_global_config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/layout.rs:12:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn post(&self, message: &str, window_manager: &mut core::WindowManager) {}
[INFO] [stdout]    |                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `window_manager`
[INFO] [stdout]   --> src/layout.rs:12:35
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn post(&self, message: &str, window_manager: &mut core::WindowManager) {}
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_window_manager`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]   --> src/layout.rs:91:28
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn layout_rects(&self, config: Rc<Config>, n: usize, rect: Rect) -> Vec<Rect> {
[INFO] [stdout]    |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `anchor_window`, `is_dialog`, and `old_border` are never read
[INFO] [stdout]   --> src/client.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Client {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 63 |     anchor_window: xlib::Window,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     is_dialog: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88 |     old_border: c_int,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TRACE` is never used
[INFO] [stdout]   --> src/core.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const TRACE: bool = true;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek` is never used
[INFO] [stdout]   --> src/core.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl BackStack {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn peek(&self) -> Option<&ClientW> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `screen` is never read
[INFO] [stdout]    --> src/core.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub struct WindowManager {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 113 |     screen: c_int,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `current_returned` is never read
[INFO] [stdout]    --> src/workspace.rs:367:5
[INFO] [stdout]     |
[INFO] [stdout] 363 | pub struct WSIter<'a> {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 367 |     current_returned: bool,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `net_wm_state_sticky` is never used
[INFO] [stdout]   --> src/atoms.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn net_wm_state_sticky() -> xlib::Atom {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/loggers.rs:173:9
[INFO] [stdout]     |
[INFO] [stdout] 173 | /         write!(self.child.stdin.as_mut().unwrap(),
[INFO] [stdout] 174 | |                "{}",
[INFO] [stdout] 175 | |                self.config.separator);
[INFO] [stdout]     | |_____________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/loggers.rs:196:9
[INFO] [stdout]     |
[INFO] [stdout] 196 |         write!(self.child.stdin.as_mut().unwrap(), "\n");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: getting the inner pointer of a temporary `CString`
[INFO] [stdout]    --> src/atoms.rs:152:69
[INFO] [stdout]     |
[INFO] [stdout] 152 |     unsafe { xlib::XInternAtom(display, CString::new(atom).unwrap().as_ptr(), 0) }
[INFO] [stdout]     |                                         --------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stdout]     |                                         |
[INFO] [stdout]     |                                         this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stdout]     |
[INFO] [stdout]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stdout]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stdout]     = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 58 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.18s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.22, traitobject v0.0.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "e9fc0c72f5f9ca7433822cccf3dd08708b690b22220735c32bdd68afc746b7f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9fc0c72f5f9ca7433822cccf3dd08708b690b22220735c32bdd68afc746b7f1", kill_on_drop: false }`
[INFO] [stdout] e9fc0c72f5f9ca7433822cccf3dd08708b690b22220735c32bdd68afc746b7f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3663f0427fde7fbada3a8852aed01c086caacf3a09b55a76a7173fcf5d235df2
[INFO] running `Command { std: "docker" "start" "-a" "3663f0427fde7fbada3a8852aed01c086caacf3a09b55a76a7173fcf5d235df2", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/util.rs:57:24
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stderr]    |                        ^           ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 57 -     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stderr] 57 +     let mut list: *mut *mut c_char = unsafe { zeroed() };
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::Cow`
[INFO] [stderr]  --> src/client.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::borrow::Cow;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `FullScreen`, `Overview`
[INFO] [stderr]   --> src/core.rs:15:14
[INFO] [stderr]    |
[INFO] [stderr] 15 | use layout::{FullScreen, Layout, Overview, Tile};
[INFO] [stderr]    |              ^^^^^^^^^^          ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ClientL`
[INFO] [stderr]  --> src/config.rs:7:14
[INFO] [stderr]   |
[INFO] [stderr] 7 | use client::{ClientL, ClientW};
[INFO] [stderr]   |              ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `mustache::MapBuilder`
[INFO] [stderr]  --> src/loggers.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use mustache::MapBuilder;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]  --> src/layout.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]  --> src/workspace.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `c_int`
[INFO] [stderr]  --> src/workspace.rs:4:20
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::os::raw::{c_int, c_uchar, c_uint};
[INFO] [stderr]   |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/prompt.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!(child.wait());
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/prompt.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         try!(child.stdout.unwrap().read_to_string(&mut result));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/prompt.rs:25:25
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let mut child = try!(process::Command::new("dmenu")
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/prompt.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |             try!(writeln!(child.stdin.as_mut().unwrap(), "{}", c));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/core.rs:122:17
[INFO] [stderr]     |
[INFO] [stderr] 122 |     logger: Box<Logger + 'static>,
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 122 |     logger: Box<dyn Logger + 'static>,
[INFO] [stderr]     |                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:22:25
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub type WmAction = Box<Fn(&mut WindowManager)>;
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub type WmAction = Box<dyn Fn(&mut WindowManager)>;
[INFO] [stderr]    |                         +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:23:32
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub type ClientPredicate = Box<Fn(&ClientW) -> bool>;
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub type ClientPredicate = Box<dyn Fn(&ClientW) -> bool>;
[INFO] [stderr]    |                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:24:29
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type ClientAction = Box<Fn(&mut ClientW)>;
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type ClientAction = Box<dyn Fn(&mut ClientW)>;
[INFO] [stderr]    |                             +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:25:28
[INFO] [stderr]    |
[INFO] [stderr] 25 | pub type StartAction = Box<Fn()>;
[INFO] [stderr]    |                            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 25 | pub type StartAction = Box<dyn Fn()>;
[INFO] [stderr]    |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/config.rs:42:39
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub tag_layout: Vec<(c_uchar, Box<Layout + 'static>)>,
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub tag_layout: Vec<(c_uchar, Box<dyn Layout + 'static>)>,
[INFO] [stderr]    |                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/layout.rs:148:21
[INFO] [stderr]     |
[INFO] [stderr] 148 |     pub layout: Box<Layout>,
[INFO] [stderr]     |                     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 148 |     pub layout: Box<dyn Layout>,
[INFO] [stderr]     |                     +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/workspace.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |     layout: Box<Layout + 'static>,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 27 |     layout: Box<dyn Layout + 'static>,
[INFO] [stderr]    |                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/workspace.rs:365:20
[INFO] [stderr]     |
[INFO] [stderr] 365 |     prev_iter: Box<Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 365 |     prev_iter: Box<dyn Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stderr]     |                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/workspace.rs:366:20
[INFO] [stderr]     |
[INFO] [stderr] 366 |     next_iter: Box<Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 366 |     next_iter: Box<dyn Iterator<Item = &'a ClientW> + 'a>,
[INFO] [stderr]     |                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/workspace.rs:385:20
[INFO] [stderr]     |
[INFO] [stderr] 385 |     prev_iter: Box<Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 385 |     prev_iter: Box<dyn Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stderr]     |                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/workspace.rs:386:20
[INFO] [stderr]     |
[INFO] [stderr] 386 |     next_iter: Box<Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 386 |     next_iter: Box<dyn Iterator<Item = &'a mut ClientW> + 'a>,
[INFO] [stderr]     |                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/client.rs:589:35
[INFO] [stderr]     |
[INFO] [stderr] 589 |                       predicate: &Fn(&Self::Item) -> bool,
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 589 |                       predicate: &dyn Fn(&Self::Item) -> bool,
[INFO] [stderr]     |                                   +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/client.rs:591:36
[INFO] [stderr]     |
[INFO] [stderr] 591 |                       yes_action: &Fn(&mut Self::Item),
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 591 |                       yes_action: &dyn Fn(&mut Self::Item),
[INFO] [stderr]     |                                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/client.rs:592:35
[INFO] [stderr]     |
[INFO] [stderr] 592 |                       no_action: &Fn(&mut Self::Item))
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 592 |                       no_action: &dyn Fn(&mut Self::Item))
[INFO] [stderr]     |                                   +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/client.rs:619:35
[INFO] [stderr]     |
[INFO] [stderr] 619 |                       predicate: &Fn(&ClientW) -> bool,
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 619 |                       predicate: &dyn Fn(&ClientW) -> bool,
[INFO] [stderr]     |                                   +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/client.rs:621:36
[INFO] [stderr]     |
[INFO] [stderr] 621 |                       yes_action: &Fn(&mut ClientW),
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 621 |                       yes_action: &dyn Fn(&mut ClientW),
[INFO] [stderr]     |                                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/client.rs:622:35
[INFO] [stderr]     |
[INFO] [stderr] 622 |                       no_action: &Fn(&mut ClientW))
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 622 |                       no_action: &dyn Fn(&mut ClientW))
[INFO] [stderr]     |                                   +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/core.rs:23:59
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn lookup_layout(config: Rc<Config>, tag: c_uchar) -> Box<Layout + 'static> {
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn lookup_layout(config: Rc<Config>, tag: c_uchar) -> Box<dyn Layout + 'static> {
[INFO] [stderr]    |                                                           +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/core.rs:318:46
[INFO] [stderr]     |
[INFO] [stderr] 318 |     pub fn set_logger(&mut self, logger: Box<Logger + 'static>) {
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 318 |     pub fn set_logger(&mut self, logger: Box<dyn Logger + 'static>) {
[INFO] [stderr]     |                                              +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/config.rs:175:59
[INFO] [stderr]     |
[INFO] [stderr] 175 |     pub fn tag_layout(mut self, layout: Vec<(c_uchar, Box<Layout + 'static>)>) -> Config {
[INFO] [stderr]     |                                                           ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 175 |     pub fn tag_layout(mut self, layout: Vec<(c_uchar, Box<dyn Layout + 'static>)>) -> Config {
[INFO] [stderr]     |                                                           +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/layout.rs:27:20
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl Clone for Box<Layout> {
[INFO] [stderr]    |                    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl Clone for Box<dyn Layout> {
[INFO] [stderr]    |                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/layout.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn clone_layout(&self) -> Box<Layout>;
[INFO] [stderr]    |                                   ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn clone_layout(&self) -> Box<dyn Layout>;
[INFO] [stderr]    |                                   +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/layout.rs:22:35
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn clone_layout(&self) -> Box<Layout> {
[INFO] [stderr]    |                                   ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn clone_layout(&self) -> Box<dyn Layout> {
[INFO] [stderr]    |                                   +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/layout.rs:28:28
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn clone(&self) -> Box<Layout> {
[INFO] [stderr]    |                            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn clone(&self) -> Box<dyn Layout> {
[INFO] [stderr]    |                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/workspace.rs:38:21
[INFO] [stderr]    |
[INFO] [stderr] 38 |         layout: Box<Layout + 'static>,
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 38 |         layout: Box<dyn Layout + 'static>,
[INFO] [stderr]    |                     +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/workspace.rs:252:41
[INFO] [stderr]     |
[INFO] [stderr] 252 |     pub fn select_clients(&self, pred: &Fn(&ClientW) -> bool) -> Vec<ClientW> {
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 252 |     pub fn select_clients(&self, pred: &dyn Fn(&ClientW) -> bool) -> Vec<ClientW> {
[INFO] [stderr]     |                                         +++
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/core.rs:865:17
[INFO] [stderr]     |
[INFO] [stderr] 865 |         for (_, mut w) in self.workspaces.iter_mut() {
[INFO] [stderr]     |                 ----^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event`
[INFO] [stderr]     --> src/core.rs:1106:36
[INFO] [stderr]      |
[INFO] [stderr] 1106 |     fn on_expose_notify(&mut self, event: xlib::XExposeEvent) {
[INFO] [stderr]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event`
[INFO] [stderr]     --> src/core.rs:1176:36
[INFO] [stderr]      |
[INFO] [stderr] 1176 |     fn on_motion_notify(&mut self, event: xlib::XMotionEvent) {
[INFO] [stderr]      |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tag`
[INFO] [stderr]     --> src/core.rs:1187:25
[INFO] [stderr]      |
[INFO] [stderr] 1187 |                     let tag = c.tag();
[INFO] [stderr]      |                         ^^^ help: if this is intentional, prefix it with an underscore: `_tag`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/core.rs:1181:21
[INFO] [stderr]      |
[INFO] [stderr] 1181 |         if let Some(mut c) = self.get_client_by_window(event.window).as_mut() {
[INFO] [stderr]      |                     ----^
[INFO] [stderr]      |                     |
[INFO] [stderr]      |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `w`
[INFO] [stderr]   --> src/config.rs:50:53
[INFO] [stderr]    |
[INFO] [stderr] 50 |             vec![(mod_mask, keysym::XK_q, Box::new(|w| process::exit(0))),
[INFO] [stderr]    |                                                     ^ help: if this is intentional, prefix it with an underscore: `_w`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `global_config`
[INFO] [stderr]    --> src/loggers.rs:128:13
[INFO] [stderr]     |
[INFO] [stderr] 128 |             global_config: &Config,
[INFO] [stderr]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_global_config`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `message`
[INFO] [stderr]   --> src/layout.rs:12:20
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn post(&self, message: &str, window_manager: &mut core::WindowManager) {}
[INFO] [stderr]    |                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `window_manager`
[INFO] [stderr]   --> src/layout.rs:12:35
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn post(&self, message: &str, window_manager: &mut core::WindowManager) {}
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_window_manager`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `config`
[INFO] [stderr]   --> src/layout.rs:91:28
[INFO] [stderr]    |
[INFO] [stderr] 91 |     fn layout_rects(&self, config: Rc<Config>, n: usize, rect: Rect) -> Vec<Rect> {
[INFO] [stderr]    |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `anchor_window`, `is_dialog`, and `old_border` are never read
[INFO] [stderr]   --> src/client.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub struct Client {
[INFO] [stderr]    |            ------ fields in this struct
[INFO] [stderr] 63 |     anchor_window: xlib::Window,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 72 |     is_dialog: bool,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 88 |     old_border: c_int,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `TRACE` is never used
[INFO] [stderr]   --> src/core.rs:21:7
[INFO] [stderr]    |
[INFO] [stderr] 21 | const TRACE: bool = true;
[INFO] [stderr]    |       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `peek` is never used
[INFO] [stderr]   --> src/core.rs:74:8
[INFO] [stderr]    |
[INFO] [stderr] 69 | impl BackStack {
[INFO] [stderr]    | -------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 74 |     fn peek(&self) -> Option<&ClientW> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `screen` is never read
[INFO] [stderr]    --> src/core.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 109 | pub struct WindowManager {
[INFO] [stderr]     |            ------------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 113 |     screen: c_int,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `current_returned` is never read
[INFO] [stderr]    --> src/workspace.rs:367:5
[INFO] [stderr]     |
[INFO] [stderr] 363 | pub struct WSIter<'a> {
[INFO] [stderr]     |            ------ field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 367 |     current_returned: bool,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `net_wm_state_sticky` is never used
[INFO] [stderr]   --> src/atoms.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn net_wm_state_sticky() -> xlib::Atom {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/loggers.rs:173:9
[INFO] [stderr]     |
[INFO] [stderr] 173 | /         write!(self.child.stdin.as_mut().unwrap(),
[INFO] [stderr] 174 | |                "{}",
[INFO] [stderr] 175 | |                self.config.separator);
[INFO] [stderr]     | |_____________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/loggers.rs:196:9
[INFO] [stderr]     |
[INFO] [stderr] 196 |         write!(self.child.stdin.as_mut().unwrap(), "\n");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: getting the inner pointer of a temporary `CString`
[INFO] [stderr]    --> src/atoms.rs:152:69
[INFO] [stderr]     |
[INFO] [stderr] 152 |     unsafe { xlib::XInternAtom(display, CString::new(atom).unwrap().as_ptr(), 0) }
[INFO] [stderr]     |                                         --------------------------- ^^^^^^ this pointer will be invalid
[INFO] [stderr]     |                                         |
[INFO] [stderr]     |                                         this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
[INFO] [stderr]     |
[INFO] [stderr]     = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
[INFO] [stderr]     = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
[INFO] [stderr]     = note: `#[warn(temporary_cstring_as_ptr)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rswm` (lib) generated 58 warnings (run `cargo fix --lib -p rswm` to apply 45 suggestions)
[INFO] [stderr] warning: `rswm` (lib test) generated 58 warnings (58 duplicates)
[INFO] [stderr] warning: unused import: `rswm::client::ClientW`
[INFO] [stderr]   --> main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use rswm::client::ClientW;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Layout`, `Tile`
[INFO] [stderr]   --> main.rs:17:20
[INFO] [stderr]    |
[INFO] [stderr] 17 | use rswm::layout::{Tile, Tile13, FullScreen, Overview, Layout};
[INFO] [stderr]    |                    ^^^^                                ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rswm` (bin "rswm" test) generated 2 warnings (run `cargo fix --bin "rswm" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.22, traitobject v0.0.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rswm-ad29c596cf4e0a33)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests main.rs (/opt/rustwide/target/debug/deps/rswm-991451d57d9b11c9)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests rswm
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/util.rs:57:24
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stderr]    |                        ^           ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 57 -     let mut list: *mut (*mut c_char) = unsafe { zeroed() };
[INFO] [stderr] 57 +     let mut list: *mut *mut c_char = unsafe { zeroed() };
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3663f0427fde7fbada3a8852aed01c086caacf3a09b55a76a7173fcf5d235df2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3663f0427fde7fbada3a8852aed01c086caacf3a09b55a76a7173fcf5d235df2", kill_on_drop: false }`
[INFO] [stdout] 3663f0427fde7fbada3a8852aed01c086caacf3a09b55a76a7173fcf5d235df2
[INFO] testing kkspeed/metal-placebo against beta-2024-01-09 for beta-1.76-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkkspeed%2Fmetal-placebo" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kkspeed/metal-placebo on toolchain beta-2024-01-09
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-01-09" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kkspeed/metal-placebo
[INFO] finished tweaking git repo https://github.com/kkspeed/metal-placebo
[INFO] tweaked toml for git repo https://github.com/kkspeed/metal-placebo written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/kkspeed/metal-placebo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-01-09" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-01-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c031037e7d4d7f0a8f388fc57e4235ca50e81c1ecbbfac7672469fff38abf0df
[INFO] running `Command { std: "docker" "start" "-a" "c031037e7d4d7f0a8f388fc57e4235ca50e81c1ecbbfac7672469fff38abf0df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c031037e7d4d7f0a8f388fc57e4235ca50e81c1ecbbfac7672469fff38abf0df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c031037e7d4d7f0a8f388fc57e4235ca50e81c1ecbbfac7672469fff38abf0df", kill_on_drop: false }`
[INFO] [stdout] c031037e7d4d7f0a8f388fc57e4235ca50e81c1ecbbfac7672469fff38abf0df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-01-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e026a772f1ac6c21a7b91722fd31e6933a0f64f58408d4eff02a2105e468c5e
[INFO] running `Command { std: "docker" "start" "-a" "6e026a772f1ac6c21a7b91722fd31e6933a0f64f58408d4eff02a2105e468c5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.1.36
[INFO] [stderr]    Compiling serde v0.8.22
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling pkg-config v0.3.8
[INFO] [stderr]    Compiling libc v0.2.19
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling error-chain v0.7.2
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling traitobject v0.0.3
[INFO] [stderr]    Compiling log v0.3.6
[INFO] [stderr]    Compiling metadeps v1.1.1
[INFO] [stderr]    Compiling unsafe-any v0.4.1
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling time v0.1.35
[INFO] [stderr]    Compiling quick-error v1.1.0
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling humantime v1.0.0
[INFO] [stderr]    Compiling antidote v1.0.0
[INFO] [stderr]    Compiling log-mdc v0.1.0
[INFO] [stderr]    Compiling num-integer v0.1.32
[INFO] [stderr]    Compiling ordered-float v0.2.3
[INFO] [stderr]    Compiling fnv v1.0.5
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling x11 v2.12.0
[INFO] [stderr]    Compiling num-iter v0.1.32
[INFO] [stderr]    Compiling num v0.1.36
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stdout] error[E0310]: the parameter type `T` may not live long enough
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rustc-serialize-0.3.22/src/serialize.rs:1155:5
[INFO] [stdout]      |
[INFO] [stdout] 1155 |     fn decode<D: Decoder>(d: &mut D) -> Result<Cow<'static, T>, D::Error> {
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |     |
[INFO] [stdout]      |     the parameter type `T` must be valid for the static lifetime...
[INFO] [stdout]      |     ...so that the type `T` will meet its required lifetime bounds...
[INFO] [stdout]      |
[INFO] [stdout] note: ...that is required by this bound
[INFO] [stdout]     --> /rustc/650745ceb2ae60e04f8cd7bfb671fc37239533e4/library/alloc/src/borrow.rs:180:30
[INFO] [stdout] help: consider adding an explicit lifetime bound
[INFO] [stdout]      |
[INFO] [stdout] 1151 | impl<'a, T: ?Sized + 'static> Decodable for Cow<'a, T>
[INFO] [stdout]      |                    +++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0310`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-serialize` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6e026a772f1ac6c21a7b91722fd31e6933a0f64f58408d4eff02a2105e468c5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e026a772f1ac6c21a7b91722fd31e6933a0f64f58408d4eff02a2105e468c5e", kill_on_drop: false }`
[INFO] [stdout] 6e026a772f1ac6c21a7b91722fd31e6933a0f64f58408d4eff02a2105e468c5e
