[INFO] cloning repository https://github.com/NickeZ/rups
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NickeZ/rups" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickeZ%2Frups", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickeZ%2Frups'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e555ecc17dc808ca515dffb2039988b4010b9ad1
[INFO] checking NickeZ/rups against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickeZ%2Frups" "/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/NickeZ/rups on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NickeZ/rups
[INFO] finished tweaking git repo https://github.com/NickeZ/rups
[INFO] tweaked toml for git repo https://github.com/NickeZ/rups written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/NickeZ/rups 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byteorder v1.2.1
[INFO] [stderr]   Downloaded net2 v0.2.31
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[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d79c39afa1bab69ef3de0d9e5b68aa2fc0db47ff9127bc81d9ffb1a9aa006281
[INFO] running `Command { std: "docker" "start" "-a" "d79c39afa1bab69ef3de0d9e5b68aa2fc0db47ff9127bc81d9ffb1a9aa006281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d79c39afa1bab69ef3de0d9e5b68aa2fc0db47ff9127bc81d9ffb1a9aa006281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d79c39afa1bab69ef3de0d9e5b68aa2fc0db47ff9127bc81d9ffb1a9aa006281", kill_on_drop: false }`
[INFO] [stdout] d79c39afa1bab69ef3de0d9e5b68aa2fc0db47ff9127bc81d9ffb1a9aa006281
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed4f15218fded4ab4acdd8aec8ee75ab855d6b027898d73cc4b5f54d126d44b2
[INFO] running `Command { std: "docker" "start" "-a" "ed4f15218fded4ab4acdd8aec8ee75ab855d6b027898d73cc4b5f54d126d44b2", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking futures v0.1.18
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking fd v0.2.3
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking clap v2.30.0
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking mio v0.6.13
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking regex v0.2.6
[INFO] [stderr]     Checking mio-uds v0.6.4
[INFO] [stderr]     Checking tokio-io v0.1.5
[INFO] [stderr]     Checking futures-addition v0.1.0 (/opt/rustwide/workdir/futures-addition)
[INFO] [stderr]     Checking tokio-timer v0.1.2
[INFO] [stdout] warning: the item `Clone` is imported redundantly
[INFO] [stdout]  --> futures-addition/src/rx_wrapper.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::clone::Clone;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Clone` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Clone` is imported redundantly
[INFO] [stdout]  --> futures-addition/src/rx_wrapper.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::clone::Clone;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Clone` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-core v0.1.12
[INFO] [stderr]     Checking rust-telnet v0.0.1 (/opt/rustwide/workdir/rust-telnet)
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> rust-telnet/src/registry.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> rust-telnet/src/registry.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-signal v0.1.4
[INFO] [stderr]     Checking tokio-file-unix v0.4.2
[INFO] [stderr]     Checking pty v0.1.0 (/opt/rustwide/workdir/pty)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]   --> pty/src/lib.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     use super::*;
[INFO] [stdout]    |         -------- the item `Future` is already imported here
[INFO] [stdout] 26 |     extern crate env_logger;
[INFO] [stdout] 27 |     use futures::Future;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rups v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `pty` is imported redundantly
[INFO] [stdout]   --> src/child.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use pty;
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | extern crate pty;
[INFO] [stdout]    | ----------------- the item `pty` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `time` is imported redundantly
[INFO] [stdout]   --> src/child.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use time;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate time;
[INFO] [stdout]    | ------------------ the item `time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `time` is imported redundantly
[INFO] [stdout]   --> src/options.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | use time;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate time;
[INFO] [stdout]    | ------------------ the item `time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]  --> src/telnet_server.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{self, Future, Sink, Stream};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate futures;
[INFO] [stdout]   | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/telnet_server.rs:28:24
[INFO] [stdout]    |
[INFO] [stdout] 28 |     listeners: Vec<Box<Future<Item = (), Error = io::Error>>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     listeners: Vec<Box<dyn Future<Item = (), Error = io::Error>>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `pty` is imported redundantly
[INFO] [stdout]   --> src/child.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use pty;
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | extern crate pty;
[INFO] [stdout]    | ----------------- the item `pty` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `time` is imported redundantly
[INFO] [stdout]   --> src/child.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use time;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate time;
[INFO] [stdout]    | ------------------ the item `time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `time` is imported redundantly
[INFO] [stdout]   --> src/options.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | use time;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate time;
[INFO] [stdout]    | ------------------ the item `time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]  --> src/telnet_server.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{self, Future, Sink, Stream};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate futures;
[INFO] [stdout]   | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/telnet_server.rs:150:57
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn server(self, handle: reactor::Handle) -> Box<Future<Item = (), Error = ()>> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn server(self, handle: reactor::Handle) -> Box<dyn Future<Item = (), Error = ()>> {
[INFO] [stdout]     |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/telnet_server.rs:28:24
[INFO] [stdout]    |
[INFO] [stdout] 28 |     listeners: Vec<Box<Future<Item = (), Error = io::Error>>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     listeners: Vec<Box<dyn Future<Item = (), Error = io::Error>>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/telnet_server.rs:150:57
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn server(self, handle: reactor::Handle) -> Box<Future<Item = (), Error = ()>> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn server(self, handle: reactor::Handle) -> Box<dyn Future<Item = (), Error = ()>> {
[INFO] [stdout]     |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/child.rs:93:75
[INFO] [stdout]    |
[INFO] [stdout] 93 |             Err(why) => panic!("Couldn't spawn {}: {}", self.args[0], why.description()),
[INFO] [stdout]    |                                                                           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/child.rs:93:75
[INFO] [stdout]    |
[INFO] [stdout] 93 |             Err(why) => panic!("Couldn't spawn {}: {}", self.args[0], why.description()),
[INFO] [stdout]    |                                                                           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:175:40
[INFO] [stdout]     |
[INFO] [stdout] 175 |         joins.push(Box::new(hr) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 175 |         joins.push(Box::new(hr) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:204:40
[INFO] [stdout]     |
[INFO] [stdout] 204 |         joins.push(Box::new(hw) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 204 |         joins.push(Box::new(hw) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:209:50
[INFO] [stdout]     |
[INFO] [stdout] 209 |     joins.push(Box::new(sigchld_handling) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 209 |     joins.push(Box::new(sigchld_handling) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:210:45
[INFO] [stdout]     |
[INFO] [stdout] 210 |     joins.push(Box::new(proc_output) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 210 |     joins.push(Box::new(proc_output) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:216:31
[INFO] [stdout]     |
[INFO] [stdout] 216 |         Box::new(join) as Box<Future<Item = (), Error = ()>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 216 |         Box::new(join) as Box<dyn Future<Item = (), Error = ()>>,
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:217:42
[INFO] [stdout]     |
[INFO] [stdout] 217 |         Box::new(sigint_handling) as Box<Future<Item = (), Error = ()>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 217 |         Box::new(sigint_handling) as Box<dyn Future<Item = (), Error = ()>>,
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:175:40
[INFO] [stdout]     |
[INFO] [stdout] 175 |         joins.push(Box::new(hr) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 175 |         joins.push(Box::new(hr) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:204:40
[INFO] [stdout]     |
[INFO] [stdout] 204 |         joins.push(Box::new(hw) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 204 |         joins.push(Box::new(hw) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:209:50
[INFO] [stdout]     |
[INFO] [stdout] 209 |     joins.push(Box::new(sigchld_handling) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 209 |     joins.push(Box::new(sigchld_handling) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:210:45
[INFO] [stdout]     |
[INFO] [stdout] 210 |     joins.push(Box::new(proc_output) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 210 |     joins.push(Box::new(proc_output) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:216:31
[INFO] [stdout]     |
[INFO] [stdout] 216 |         Box::new(join) as Box<Future<Item = (), Error = ()>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 216 |         Box::new(join) as Box<dyn Future<Item = (), Error = ()>>,
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:217:42
[INFO] [stdout]     |
[INFO] [stdout] 217 |         Box::new(sigint_handling) as Box<Future<Item = (), Error = ()>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 217 |         Box::new(sigint_handling) as Box<dyn Future<Item = (), Error = ()>>,
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/child.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoError(io::Error),
[INFO] [stdout]    |     ------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoError(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/child.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoError(io::Error),
[INFO] [stdout]    |     ------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoError(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.83s
[INFO] running `Command { std: "docker" "inspect" "ed4f15218fded4ab4acdd8aec8ee75ab855d6b027898d73cc4b5f54d126d44b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed4f15218fded4ab4acdd8aec8ee75ab855d6b027898d73cc4b5f54d126d44b2", kill_on_drop: false }`
[INFO] [stdout] ed4f15218fded4ab4acdd8aec8ee75ab855d6b027898d73cc4b5f54d126d44b2
[INFO] checking NickeZ/rups against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNickeZ%2Frups" "/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/NickeZ/rups on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NickeZ/rups
[INFO] finished tweaking git repo https://github.com/NickeZ/rups
[INFO] tweaked toml for git repo https://github.com/NickeZ/rups written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/NickeZ/rups 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4172aac551df0d00f7b4355cc6601f29f5435ff46c091bc1c18253bd5a3bed10
[INFO] running `Command { std: "docker" "start" "-a" "4172aac551df0d00f7b4355cc6601f29f5435ff46c091bc1c18253bd5a3bed10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4172aac551df0d00f7b4355cc6601f29f5435ff46c091bc1c18253bd5a3bed10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4172aac551df0d00f7b4355cc6601f29f5435ff46c091bc1c18253bd5a3bed10", kill_on_drop: false }`
[INFO] [stdout] 4172aac551df0d00f7b4355cc6601f29f5435ff46c091bc1c18253bd5a3bed10
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 759eacf16f2acb5aae8b7071d0e14f0f1c8ecda46aaeb476db8bd286a72d193a
[INFO] running `Command { std: "docker" "start" "-a" "759eacf16f2acb5aae8b7071d0e14f0f1c8ecda46aaeb476db8bd286a72d193a", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking futures v0.1.18
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking fd v0.2.3
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking clap v2.30.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking mio v0.6.13
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking tokio-io v0.1.5
[INFO] [stderr]     Checking futures-addition v0.1.0 (/opt/rustwide/workdir/futures-addition)
[INFO] [stderr]     Checking tokio-timer v0.1.2
[INFO] [stderr]     Checking regex v0.2.6
[INFO] [stdout] warning: the item `Clone` is imported redundantly
[INFO] [stdout]  --> futures-addition/src/rx_wrapper.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::clone::Clone;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Clone` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Clone` is imported redundantly
[INFO] [stdout]  --> futures-addition/src/rx_wrapper.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::clone::Clone;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Clone` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mio-uds v0.6.4
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-core v0.1.12
[INFO] [stderr]     Checking rust-telnet v0.0.1 (/opt/rustwide/workdir/rust-telnet)
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> rust-telnet/src/registry.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> rust-telnet/src/registry.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking pty v0.1.0 (/opt/rustwide/workdir/pty)
[INFO] [stderr]     Checking tokio-signal v0.1.4
[INFO] [stderr]     Checking tokio-file-unix v0.4.2
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]   --> pty/src/lib.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     use super::*;
[INFO] [stdout]    |         -------- the item `Future` is already imported here
[INFO] [stdout] 26 |     extern crate env_logger;
[INFO] [stdout] 27 |     use futures::Future;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rups v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `pty` is imported redundantly
[INFO] [stdout]   --> src/child.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use pty;
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | extern crate pty;
[INFO] [stdout]    | ----------------- the item `pty` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `time` is imported redundantly
[INFO] [stdout]   --> src/child.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use time;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate time;
[INFO] [stdout]    | ------------------ the item `time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `time` is imported redundantly
[INFO] [stdout]   --> src/options.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | use time;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate time;
[INFO] [stdout]    | ------------------ the item `time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]  --> src/telnet_server.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{self, Future, Sink, Stream};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate futures;
[INFO] [stdout]   | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/telnet_server.rs:28:24
[INFO] [stdout]    |
[INFO] [stdout] 28 |     listeners: Vec<Box<Future<Item = (), Error = io::Error>>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     listeners: Vec<Box<dyn Future<Item = (), Error = io::Error>>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `pty` is imported redundantly
[INFO] [stdout]   --> src/child.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use pty;
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | extern crate pty;
[INFO] [stdout]    | ----------------- the item `pty` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/telnet_server.rs:150:57
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn server(self, handle: reactor::Handle) -> Box<Future<Item = (), Error = ()>> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn server(self, handle: reactor::Handle) -> Box<dyn Future<Item = (), Error = ()>> {
[INFO] [stdout]     |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `time` is imported redundantly
[INFO] [stdout]   --> src/child.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use time;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate time;
[INFO] [stdout]    | ------------------ the item `time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `time` is imported redundantly
[INFO] [stdout]   --> src/options.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | use time;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate time;
[INFO] [stdout]    | ------------------ the item `time` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]  --> src/telnet_server.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{self, Future, Sink, Stream};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate futures;
[INFO] [stdout]   | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/telnet_server.rs:28:24
[INFO] [stdout]    |
[INFO] [stdout] 28 |     listeners: Vec<Box<Future<Item = (), Error = io::Error>>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 |     listeners: Vec<Box<dyn Future<Item = (), Error = io::Error>>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/child.rs:93:75
[INFO] [stdout]    |
[INFO] [stdout] 93 |             Err(why) => panic!("Couldn't spawn {}: {}", self.args[0], why.description()),
[INFO] [stdout]    |                                                                           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/telnet_server.rs:150:57
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn server(self, handle: reactor::Handle) -> Box<Future<Item = (), Error = ()>> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn server(self, handle: reactor::Handle) -> Box<dyn Future<Item = (), Error = ()>> {
[INFO] [stdout]     |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/child.rs:93:75
[INFO] [stdout]    |
[INFO] [stdout] 93 |             Err(why) => panic!("Couldn't spawn {}: {}", self.args[0], why.description()),
[INFO] [stdout]    |                                                                           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:175:40
[INFO] [stdout]     |
[INFO] [stdout] 175 |         joins.push(Box::new(hr) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 175 |         joins.push(Box::new(hr) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:204:40
[INFO] [stdout]     |
[INFO] [stdout] 204 |         joins.push(Box::new(hw) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 204 |         joins.push(Box::new(hw) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:209:50
[INFO] [stdout]     |
[INFO] [stdout] 209 |     joins.push(Box::new(sigchld_handling) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 209 |     joins.push(Box::new(sigchld_handling) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:210:45
[INFO] [stdout]     |
[INFO] [stdout] 210 |     joins.push(Box::new(proc_output) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 210 |     joins.push(Box::new(proc_output) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:175:40
[INFO] [stdout]     |
[INFO] [stdout] 175 |         joins.push(Box::new(hr) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 175 |         joins.push(Box::new(hr) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:204:40
[INFO] [stdout]     |
[INFO] [stdout] 204 |         joins.push(Box::new(hw) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 204 |         joins.push(Box::new(hw) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:209:50
[INFO] [stdout]     |
[INFO] [stdout] 209 |     joins.push(Box::new(sigchld_handling) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 209 |     joins.push(Box::new(sigchld_handling) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:210:45
[INFO] [stdout]     |
[INFO] [stdout] 210 |     joins.push(Box::new(proc_output) as Box<Future<Item = (), Error = ()>>);
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 210 |     joins.push(Box::new(proc_output) as Box<dyn Future<Item = (), Error = ()>>);
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:216:31
[INFO] [stdout]     |
[INFO] [stdout] 216 |         Box::new(join) as Box<Future<Item = (), Error = ()>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 216 |         Box::new(join) as Box<dyn Future<Item = (), Error = ()>>,
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:217:42
[INFO] [stdout]     |
[INFO] [stdout] 217 |         Box::new(sigint_handling) as Box<Future<Item = (), Error = ()>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 217 |         Box::new(sigint_handling) as Box<dyn Future<Item = (), Error = ()>>,
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:216:31
[INFO] [stdout]     |
[INFO] [stdout] 216 |         Box::new(join) as Box<Future<Item = (), Error = ()>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 216 |         Box::new(join) as Box<dyn Future<Item = (), Error = ()>>,
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:217:42
[INFO] [stdout]     |
[INFO] [stdout] 217 |         Box::new(sigint_handling) as Box<Future<Item = (), Error = ()>>,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 217 |         Box::new(sigint_handling) as Box<dyn Future<Item = (), Error = ()>>,
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/child.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoError(io::Error),
[INFO] [stdout]    |     ------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoError(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/child.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoError(io::Error),
[INFO] [stdout]    |     ------- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 |     IoError(()),
[INFO] [stdout]    |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.80s
[INFO] running `Command { std: "docker" "inspect" "759eacf16f2acb5aae8b7071d0e14f0f1c8ecda46aaeb476db8bd286a72d193a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "759eacf16f2acb5aae8b7071d0e14f0f1c8ecda46aaeb476db8bd286a72d193a", kill_on_drop: false }`
[INFO] [stdout] 759eacf16f2acb5aae8b7071d0e14f0f1c8ecda46aaeb476db8bd286a72d193a