[INFO] fetching crate argonaut 0.12.0...
[INFO] checking argonaut-0.12.0 against master#b286722878e18db29a7fbe672be7c4d3b02e8e4d for pr-127655
[INFO] extracting crate argonaut 0.12.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate argonaut 0.12.0 on toolchain b286722878e18db29a7fbe672be7c4d3b02e8e4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate argonaut 0.12.0
[INFO] finished tweaking crates.io crate argonaut 0.12.0
[INFO] tweaked toml for crates.io crate argonaut 0.12.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3845a55664623894310216ee460050d9ae9e4f23a909830a6d475bc0cb75d57b
[INFO] running `Command { std: "docker" "start" "-a" "3845a55664623894310216ee460050d9ae9e4f23a909830a6d475bc0cb75d57b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3845a55664623894310216ee460050d9ae9e4f23a909830a6d475bc0cb75d57b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3845a55664623894310216ee460050d9ae9e4f23a909830a6d475bc0cb75d57b", kill_on_drop: false }`
[INFO] [stdout] 3845a55664623894310216ee460050d9ae9e4f23a909830a6d475bc0cb75d57b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+b286722878e18db29a7fbe672be7c4d3b02e8e4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b21964f557168bce2cffbd1bb197e72ba9fc0b9deec7cf291f73b5a78819128
[INFO] running `Command { std: "docker" "start" "-a" "2b21964f557168bce2cffbd1bb197e72ba9fc0b9deec7cf291f73b5a78819128", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking argonaut v0.12.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `std_unicode`
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate std_unicode;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `std_unicode`
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate std_unicode;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(conservative_impl_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `unicode`
[INFO] [stdout]   --> src/lib.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(unicode)]
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:10:29
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub type SubCmd<'def> = Box<FnMut(String, &[&str]) -> Result<Option<i32>, ParseError<'def>>>;
[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] 10 | pub type SubCmd<'def> = Box<dyn FnMut(String, &[&str]) -> Result<Option<i32>, ParseError<'def>>>;
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(conservative_impl_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:23:27
[INFO] [stdout]    |
[INFO] [stdout] 23 |         target: &'tar mut SingleTarget,
[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] 23 |         target: &'tar mut dyn SingleTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:29:27
[INFO] [stdout]    |
[INFO] [stdout] 29 |         target: &'tar mut CollectionTarget,
[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] 29 |         target: &'tar mut dyn CollectionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:41:27
[INFO] [stdout]    |
[INFO] [stdout] 41 |         target: &'tar mut CollectionTarget,
[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] 41 |         target: &'tar mut dyn CollectionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `unicode`
[INFO] [stdout]   --> src/lib.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(unicode)]
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:46:27
[INFO] [stdout]    |
[INFO] [stdout] 46 |         target: &'tar mut OptionTarget,
[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] 46 |         target: &'tar mut dyn OptionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:51:23
[INFO] [stdout]    |
[INFO] [stdout] 51 |         callback: Box<FnMut(Rc<Help<'def>>)>,
[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] 51 |         callback: Box<dyn FnMut(Rc<Help<'def>>)>,
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Setting(&'tar mut OptionTarget),
[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] 12 |     Setting(&'tar mut dyn OptionTarget),
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:10:29
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub type SubCmd<'def> = Box<FnMut(String, &[&str]) -> Result<Option<i32>, ParseError<'def>>>;
[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] 10 | pub type SubCmd<'def> = Box<dyn FnMut(String, &[&str]) -> Result<Option<i32>, ParseError<'def>>>;
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Interrupt(Box<FnMut(Rc<Help<'def>>)>),
[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] 13 |     Interrupt(Box<dyn FnMut(Rc<Help<'def>>)>),
[INFO] [stdout]    |                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Collect(&'tar mut CollectionTarget),
[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] 14 |     Collect(&'tar mut dyn CollectionTarget),
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:23:27
[INFO] [stdout]    |
[INFO] [stdout] 23 |         target: &'tar mut SingleTarget,
[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] 23 |         target: &'tar mut dyn SingleTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:20:53
[INFO] [stdout]    |
[INFO] [stdout] 20 |     positional: VecDeque<(Cow<'def, str>, &'tar mut SingleTarget)>,
[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] 20 |     positional: VecDeque<(Cow<'def, str>, &'tar mut dyn SingleTarget)>,
[INFO] [stdout]    |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:22:52
[INFO] [stdout]    |
[INFO] [stdout] 22 |     trail: Option<(Cow<'def, str>, bool, &'tar mut CollectionTarget)>,
[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] 22 |     trail: Option<(Cow<'def, str>, bool, &'tar mut dyn CollectionTarget)>,
[INFO] [stdout]    |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:29:27
[INFO] [stdout]    |
[INFO] [stdout] 29 |         target: &'tar mut CollectionTarget,
[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] 29 |         target: &'tar mut dyn CollectionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:41:27
[INFO] [stdout]    |
[INFO] [stdout] 41 |         target: &'tar mut CollectionTarget,
[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] 41 |         target: &'tar mut dyn CollectionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:46:27
[INFO] [stdout]    |
[INFO] [stdout] 46 |         target: &'tar mut OptionTarget,
[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] 46 |         target: &'tar mut dyn OptionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:51:23
[INFO] [stdout]    |
[INFO] [stdout] 51 |         callback: Box<FnMut(Rc<Help<'def>>)>,
[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] 51 |         callback: Box<dyn FnMut(Rc<Help<'def>>)>,
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:72:53
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn positional<N>(name: N, target: &'tar mut SingleTarget) -> ArgDef<'def, 'tar> 
[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] 72 |     pub fn positional<N>(name: N, target: &'tar mut dyn SingleTarget) -> ArgDef<'def, 'tar> 
[INFO] [stdout]    |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Setting(&'tar mut OptionTarget),
[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] 12 |     Setting(&'tar mut dyn OptionTarget),
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:83:64
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn trail<N>(name: N, optional: bool, target: &'tar mut CollectionTarget) -> ArgDef<'def, 'tar>
[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] 83 |     pub fn trail<N>(name: N, optional: bool, target: &'tar mut dyn CollectionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Interrupt(Box<FnMut(Rc<Help<'def>>)>),
[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] 13 |     Interrupt(Box<dyn FnMut(Rc<Help<'def>>)>),
[INFO] [stdout]    |                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/argdef.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn setting<N>(name: N, target: &'tar mut OptionTarget) -> ArgDef<'def, 'tar>
[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] 118 |     pub fn setting<N>(name: N, target: &'tar mut dyn OptionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Collect(&'tar mut CollectionTarget),
[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] 14 |     Collect(&'tar mut dyn CollectionTarget),
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/argdef.rs:148:50
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub fn collect<N>(name: N, target: &'tar mut CollectionTarget) -> ArgDef<'def, 'tar>
[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] 148 |     pub fn collect<N>(name: N, target: &'tar mut dyn CollectionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:20:53
[INFO] [stdout]    |
[INFO] [stdout] 20 |     positional: VecDeque<(Cow<'def, str>, &'tar mut SingleTarget)>,
[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] 20 |     positional: VecDeque<(Cow<'def, str>, &'tar mut dyn SingleTarget)>,
[INFO] [stdout]    |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:22:52
[INFO] [stdout]    |
[INFO] [stdout] 22 |     trail: Option<(Cow<'def, str>, bool, &'tar mut CollectionTarget)>,
[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] 22 |     trail: Option<(Cow<'def, str>, bool, &'tar mut dyn CollectionTarget)>,
[INFO] [stdout]    |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:72:53
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn positional<N>(name: N, target: &'tar mut SingleTarget) -> ArgDef<'def, 'tar> 
[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] 72 |     pub fn positional<N>(name: N, target: &'tar mut dyn SingleTarget) -> ArgDef<'def, 'tar> 
[INFO] [stdout]    |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:83:64
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn trail<N>(name: N, optional: bool, target: &'tar mut CollectionTarget) -> ArgDef<'def, 'tar>
[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] 83 |     pub fn trail<N>(name: N, optional: bool, target: &'tar mut dyn CollectionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/argdef.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn setting<N>(name: N, target: &'tar mut OptionTarget) -> ArgDef<'def, 'tar>
[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] 118 |     pub fn setting<N>(name: N, target: &'tar mut dyn OptionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/argdef.rs:148:50
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub fn collect<N>(name: N, target: &'tar mut CollectionTarget) -> ArgDef<'def, 'tar>
[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] 148 |     pub fn collect<N>(name: N, target: &'tar mut dyn CollectionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_whitespace` found for reference `&str` in the current scope
[INFO] [stdout]  --> src/help.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 |         .rev().skip_while(|&l| l == "" || l.is_whitespace()).collect();
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a method `split_ascii_whitespace` with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 7 |         .rev().skip_while(|&l| l == "" || l.split_ascii_whitespace()).collect();
[INFO] [stdout]   |                                             ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_whitespace` found for reference `&str` in the current scope
[INFO] [stdout]  --> src/help.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 |         .rev().skip_while(|&l| l == "" || l.is_whitespace()).collect();
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a method `split_ascii_whitespace` with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 7 |         .rev().skip_while(|&l| l == "" || l.split_ascii_whitespace()).collect();
[INFO] [stdout]   |                                             ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_whitespace` found for reference `&str` in the current scope
[INFO] [stdout]  --> src/help.rs:9:45
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .rev().skip_while(|&l| l == "" || l.is_whitespace())
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a method `split_ascii_whitespace` with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .rev().skip_while(|&l| l == "" || l.split_ascii_whitespace())
[INFO] [stdout]   |                                             ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_whitespace` found for reference `&str` in the current scope
[INFO] [stdout]  --> src/help.rs:9:45
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .rev().skip_while(|&l| l == "" || l.is_whitespace())
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a method `split_ascii_whitespace` with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .rev().skip_while(|&l| l == "" || l.split_ascii_whitespace())
[INFO] [stdout]   |                                             ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `argonaut` (lib test) due to 5 previous errors; 16 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `argonaut` (lib) due to 5 previous errors; 16 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "2b21964f557168bce2cffbd1bb197e72ba9fc0b9deec7cf291f73b5a78819128", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b21964f557168bce2cffbd1bb197e72ba9fc0b9deec7cf291f73b5a78819128", kill_on_drop: false }`
[INFO] [stdout] 2b21964f557168bce2cffbd1bb197e72ba9fc0b9deec7cf291f73b5a78819128
[INFO] checking argonaut-0.12.0 against try#6a5749073f2ebf59d7740d30e50a932a85756ee7 for pr-127655
[INFO] extracting crate argonaut 0.12.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate argonaut 0.12.0 on toolchain 6a5749073f2ebf59d7740d30e50a932a85756ee7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate argonaut 0.12.0
[INFO] finished tweaking crates.io crate argonaut 0.12.0
[INFO] tweaked toml for crates.io crate argonaut 0.12.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5726468ed73d74c4d962532b98889783df3ebf9f915a77c49fab8ba48bdc6aa
[INFO] running `Command { std: "docker" "start" "-a" "c5726468ed73d74c4d962532b98889783df3ebf9f915a77c49fab8ba48bdc6aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5726468ed73d74c4d962532b98889783df3ebf9f915a77c49fab8ba48bdc6aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5726468ed73d74c4d962532b98889783df3ebf9f915a77c49fab8ba48bdc6aa", kill_on_drop: false }`
[INFO] [stdout] c5726468ed73d74c4d962532b98889783df3ebf9f915a77c49fab8ba48bdc6aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+6a5749073f2ebf59d7740d30e50a932a85756ee7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9cb3a59b626ea5a6d471b2bb1e773cfd52310812bf18bee1b108a0c69987a5c
[INFO] running `Command { std: "docker" "start" "-a" "b9cb3a59b626ea5a6d471b2bb1e773cfd52310812bf18bee1b108a0c69987a5c", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking argonaut v0.12.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `std_unicode`
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate std_unicode;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `std_unicode`
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate std_unicode;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(conservative_impl_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(conservative_impl_trait)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `unicode`
[INFO] [stdout]   --> src/lib.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(unicode)]
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `unicode`
[INFO] [stdout]   --> src/lib.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(unicode)]
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:10:29
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub type SubCmd<'def> = Box<FnMut(String, &[&str]) -> Result<Option<i32>, ParseError<'def>>>;
[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] 10 | pub type SubCmd<'def> = Box<dyn FnMut(String, &[&str]) -> Result<Option<i32>, ParseError<'def>>>;
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:10:29
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub type SubCmd<'def> = Box<FnMut(String, &[&str]) -> Result<Option<i32>, ParseError<'def>>>;
[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] 10 | pub type SubCmd<'def> = Box<dyn FnMut(String, &[&str]) -> Result<Option<i32>, ParseError<'def>>>;
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:23:27
[INFO] [stdout]    |
[INFO] [stdout] 23 |         target: &'tar mut SingleTarget,
[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] 23 |         target: &'tar mut dyn SingleTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:29:27
[INFO] [stdout]    |
[INFO] [stdout] 29 |         target: &'tar mut CollectionTarget,
[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] 29 |         target: &'tar mut dyn CollectionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:23:27
[INFO] [stdout]    |
[INFO] [stdout] 23 |         target: &'tar mut SingleTarget,
[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] 23 |         target: &'tar mut dyn SingleTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:41:27
[INFO] [stdout]    |
[INFO] [stdout] 41 |         target: &'tar mut CollectionTarget,
[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] 41 |         target: &'tar mut dyn CollectionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:29:27
[INFO] [stdout]    |
[INFO] [stdout] 29 |         target: &'tar mut CollectionTarget,
[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] 29 |         target: &'tar mut dyn CollectionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:46:27
[INFO] [stdout]    |
[INFO] [stdout] 46 |         target: &'tar mut OptionTarget,
[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] 46 |         target: &'tar mut dyn OptionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:41:27
[INFO] [stdout]    |
[INFO] [stdout] 41 |         target: &'tar mut CollectionTarget,
[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] 41 |         target: &'tar mut dyn CollectionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:51:23
[INFO] [stdout]    |
[INFO] [stdout] 51 |         callback: Box<FnMut(Rc<Help<'def>>)>,
[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] 51 |         callback: Box<dyn FnMut(Rc<Help<'def>>)>,
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:46:27
[INFO] [stdout]    |
[INFO] [stdout] 46 |         target: &'tar mut OptionTarget,
[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] 46 |         target: &'tar mut dyn OptionTarget,
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Setting(&'tar mut OptionTarget),
[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] 12 |     Setting(&'tar mut dyn OptionTarget),
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:51:23
[INFO] [stdout]    |
[INFO] [stdout] 51 |         callback: Box<FnMut(Rc<Help<'def>>)>,
[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] 51 |         callback: Box<dyn FnMut(Rc<Help<'def>>)>,
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Interrupt(Box<FnMut(Rc<Help<'def>>)>),
[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] 13 |     Interrupt(Box<dyn FnMut(Rc<Help<'def>>)>),
[INFO] [stdout]    |                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Collect(&'tar mut CollectionTarget),
[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] 14 |     Collect(&'tar mut dyn CollectionTarget),
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Setting(&'tar mut OptionTarget),
[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] 12 |     Setting(&'tar mut dyn OptionTarget),
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Interrupt(Box<FnMut(Rc<Help<'def>>)>),
[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] 13 |     Interrupt(Box<dyn FnMut(Rc<Help<'def>>)>),
[INFO] [stdout]    |                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:20:53
[INFO] [stdout]    |
[INFO] [stdout] 20 |     positional: VecDeque<(Cow<'def, str>, &'tar mut SingleTarget)>,
[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] 20 |     positional: VecDeque<(Cow<'def, str>, &'tar mut dyn SingleTarget)>,
[INFO] [stdout]    |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Collect(&'tar mut CollectionTarget),
[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] 14 |     Collect(&'tar mut dyn CollectionTarget),
[INFO] [stdout]    |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:22:52
[INFO] [stdout]    |
[INFO] [stdout] 22 |     trail: Option<(Cow<'def, str>, bool, &'tar mut CollectionTarget)>,
[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] 22 |     trail: Option<(Cow<'def, str>, bool, &'tar mut dyn CollectionTarget)>,
[INFO] [stdout]    |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:20:53
[INFO] [stdout]    |
[INFO] [stdout] 20 |     positional: VecDeque<(Cow<'def, str>, &'tar mut SingleTarget)>,
[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] 20 |     positional: VecDeque<(Cow<'def, str>, &'tar mut dyn SingleTarget)>,
[INFO] [stdout]    |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parse.rs:22:52
[INFO] [stdout]    |
[INFO] [stdout] 22 |     trail: Option<(Cow<'def, str>, bool, &'tar mut CollectionTarget)>,
[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] 22 |     trail: Option<(Cow<'def, str>, bool, &'tar mut dyn CollectionTarget)>,
[INFO] [stdout]    |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:72:53
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn positional<N>(name: N, target: &'tar mut SingleTarget) -> ArgDef<'def, 'tar> 
[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] 72 |     pub fn positional<N>(name: N, target: &'tar mut dyn SingleTarget) -> ArgDef<'def, 'tar> 
[INFO] [stdout]    |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:83:64
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn trail<N>(name: N, optional: bool, target: &'tar mut CollectionTarget) -> ArgDef<'def, 'tar>
[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] 83 |     pub fn trail<N>(name: N, optional: bool, target: &'tar mut dyn CollectionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:72:53
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn positional<N>(name: N, target: &'tar mut SingleTarget) -> ArgDef<'def, 'tar> 
[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] 72 |     pub fn positional<N>(name: N, target: &'tar mut dyn SingleTarget) -> ArgDef<'def, 'tar> 
[INFO] [stdout]    |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/argdef.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn setting<N>(name: N, target: &'tar mut OptionTarget) -> ArgDef<'def, 'tar>
[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] 118 |     pub fn setting<N>(name: N, target: &'tar mut dyn OptionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/argdef.rs:83:64
[INFO] [stdout]    |
[INFO] [stdout] 83 |     pub fn trail<N>(name: N, optional: bool, target: &'tar mut CollectionTarget) -> ArgDef<'def, 'tar>
[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] 83 |     pub fn trail<N>(name: N, optional: bool, target: &'tar mut dyn CollectionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/argdef.rs:148:50
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub fn collect<N>(name: N, target: &'tar mut CollectionTarget) -> ArgDef<'def, 'tar>
[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] 148 |     pub fn collect<N>(name: N, target: &'tar mut dyn CollectionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/argdef.rs:118:50
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn setting<N>(name: N, target: &'tar mut OptionTarget) -> ArgDef<'def, 'tar>
[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] 118 |     pub fn setting<N>(name: N, target: &'tar mut dyn OptionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/argdef.rs:148:50
[INFO] [stdout]     |
[INFO] [stdout] 148 |     pub fn collect<N>(name: N, target: &'tar mut CollectionTarget) -> ArgDef<'def, 'tar>
[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] 148 |     pub fn collect<N>(name: N, target: &'tar mut dyn CollectionTarget) -> ArgDef<'def, 'tar>
[INFO] [stdout]     |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_whitespace` found for reference `&str` in the current scope
[INFO] [stdout]  --> src/help.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 |         .rev().skip_while(|&l| l == "" || l.is_whitespace()).collect();
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a method `split_ascii_whitespace` with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 7 |         .rev().skip_while(|&l| l == "" || l.split_ascii_whitespace()).collect();
[INFO] [stdout]   |                                             ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_whitespace` found for reference `&str` in the current scope
[INFO] [stdout]  --> src/help.rs:7:45
[INFO] [stdout]   |
[INFO] [stdout] 7 |         .rev().skip_while(|&l| l == "" || l.is_whitespace()).collect();
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a method `split_ascii_whitespace` with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 7 |         .rev().skip_while(|&l| l == "" || l.split_ascii_whitespace()).collect();
[INFO] [stdout]   |                                             ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_whitespace` found for reference `&str` in the current scope
[INFO] [stdout]  --> src/help.rs:9:45
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .rev().skip_while(|&l| l == "" || l.is_whitespace())
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a method `split_ascii_whitespace` with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .rev().skip_while(|&l| l == "" || l.split_ascii_whitespace())
[INFO] [stdout]   |                                             ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_whitespace` found for reference `&str` in the current scope
[INFO] [stdout]  --> src/help.rs:9:45
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .rev().skip_while(|&l| l == "" || l.is_whitespace())
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: there is a method `split_ascii_whitespace` with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 9 |         .rev().skip_while(|&l| l == "" || l.split_ascii_whitespace())
[INFO] [stdout]   |                                             ~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `argonaut` (lib) due to 5 previous errors; 16 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 4 previous errors; 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `argonaut` (lib test) due to 5 previous errors; 16 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "b9cb3a59b626ea5a6d471b2bb1e773cfd52310812bf18bee1b108a0c69987a5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9cb3a59b626ea5a6d471b2bb1e773cfd52310812bf18bee1b108a0c69987a5c", kill_on_drop: false }`
[INFO] [stdout] b9cb3a59b626ea5a6d471b2bb1e773cfd52310812bf18bee1b108a0c69987a5c
