[INFO] fetching crate tf_playlist 0.1.4...
[INFO] testing tf_playlist-0.1.4 against 1.95.0 for beta-1.96-2
[INFO] extracting crate tf_playlist 0.1.4 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate tf_playlist 0.1.4
[INFO] finished tweaking crates.io crate tf_playlist 0.1.4
[INFO] tweaked toml for crates.io crate tf_playlist 0.1.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tf_playlist 0.1.4 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tf_observer v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b30f9d168c8c11dfe9f562d4b990f36c3b9addace3ce729f6da0bac2a2481acc
[INFO] running `Command { std: "docker" "start" "-a" "b30f9d168c8c11dfe9f562d4b990f36c3b9addace3ce729f6da0bac2a2481acc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b30f9d168c8c11dfe9f562d4b990f36c3b9addace3ce729f6da0bac2a2481acc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b30f9d168c8c11dfe9f562d4b990f36c3b9addace3ce729f6da0bac2a2481acc", kill_on_drop: false }`
[INFO] [stdout] b30f9d168c8c11dfe9f562d4b990f36c3b9addace3ce729f6da0bac2a2481acc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d3ebfe6b6ea821f1c0dd45e71cea1fd80f6801f8dc8d21cd13d9873d496bd8a
[INFO] running `Command { std: "docker" "start" "-a" "3d3ebfe6b6ea821f1c0dd45e71cea1fd80f6801f8dc8d21cd13d9873d496bd8a", kill_on_drop: false }`
[INFO] [stderr]    Compiling tf_observer v0.1.3
[INFO] [stderr]    Compiling tf_playlist v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist.rs:90:45
[INFO] [stdout]    |
[INFO] [stdout] 90 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 90 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 90 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist.rs:97:45
[INFO] [stdout]    |
[INFO] [stdout] 97 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 97 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 97 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist_manager.rs:54:45
[INFO] [stdout]    |
[INFO] [stdout] 54 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 54 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 54 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist_manager.rs:70:45
[INFO] [stdout]    |
[INFO] [stdout] 70 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 70 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 70 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/playlist_manager.rs:106:45
[INFO] [stdout]     |
[INFO] [stdout] 106 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]     |                                             ^                                               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 106 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 106 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/playlist_manager.rs:114:45
[INFO] [stdout]     |
[INFO] [stdout] 114 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]     |                                             ^                                               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 114 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 114 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "3d3ebfe6b6ea821f1c0dd45e71cea1fd80f6801f8dc8d21cd13d9873d496bd8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d3ebfe6b6ea821f1c0dd45e71cea1fd80f6801f8dc8d21cd13d9873d496bd8a", kill_on_drop: false }`
[INFO] [stdout] 3d3ebfe6b6ea821f1c0dd45e71cea1fd80f6801f8dc8d21cd13d9873d496bd8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a71bf275c85f43c2e0a80c2d59814021872729c4e21dee382eb372d2bfa89ad
[INFO] running `Command { std: "docker" "start" "-a" "4a71bf275c85f43c2e0a80c2d59814021872729c4e21dee382eb372d2bfa89ad", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist.rs:90:45
[INFO] [stdout]    |
[INFO] [stdout] 90 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 90 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 90 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist.rs:97:45
[INFO] [stdout]    |
[INFO] [stdout] 97 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 97 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 97 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist_manager.rs:54:45
[INFO] [stdout]    |
[INFO] [stdout] 54 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 54 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 54 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist_manager.rs:70:45
[INFO] [stdout]    |
[INFO] [stdout] 70 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 70 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 70 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/playlist_manager.rs:106:45
[INFO] [stdout]     |
[INFO] [stdout] 106 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]     |                                             ^                                               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 106 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 106 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/playlist_manager.rs:114:45
[INFO] [stdout]     |
[INFO] [stdout] 114 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]     |                                             ^                                               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 114 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 114 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tf_playlist v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist.rs:90:45
[INFO] [stdout]    |
[INFO] [stdout] 90 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 90 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 90 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist.rs:97:45
[INFO] [stdout]    |
[INFO] [stdout] 97 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 97 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 97 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist_manager.rs:54:45
[INFO] [stdout]    |
[INFO] [stdout] 54 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 54 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 54 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/playlist_manager.rs:70:45
[INFO] [stdout]    |
[INFO] [stdout] 70 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]    |                                             ^                                               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 70 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 70 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/playlist_manager.rs:106:45
[INFO] [stdout]     |
[INFO] [stdout] 106 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]     |                                             ^                                               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 106 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 106 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/playlist_manager.rs:114:45
[INFO] [stdout]     |
[INFO] [stdout] 114 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout]     |                                             ^                                               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 114 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stdout] 114 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "4a71bf275c85f43c2e0a80c2d59814021872729c4e21dee382eb372d2bfa89ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a71bf275c85f43c2e0a80c2d59814021872729c4e21dee382eb372d2bfa89ad", kill_on_drop: false }`
[INFO] [stdout] 4a71bf275c85f43c2e0a80c2d59814021872729c4e21dee382eb372d2bfa89ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fe404d41347bd599af8a8d623d64b5945b8ebc0e36a094dae69b4e38236d1b52
[INFO] running `Command { std: "docker" "start" "-a" "fe404d41347bd599af8a8d623d64b5945b8ebc0e36a094dae69b4e38236d1b52", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/playlist.rs:90:45
[INFO] [stderr]    |
[INFO] [stderr] 90 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]    |                                             ^                                               ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 90 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 90 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/playlist.rs:97:45
[INFO] [stderr]    |
[INFO] [stderr] 97 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]    |                                             ^                                               ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 97 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 97 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/playlist_manager.rs:54:45
[INFO] [stderr]    |
[INFO] [stderr] 54 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]    |                                             ^                                               ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 54 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 54 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/playlist_manager.rs:70:45
[INFO] [stderr]    |
[INFO] [stderr] 70 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]    |                                             ^                                               ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 70 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 70 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/playlist_manager.rs:106:45
[INFO] [stderr]     |
[INFO] [stderr] 106 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]     |                                             ^                                               ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 106 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 106 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/playlist_manager.rs:114:45
[INFO] [stderr]     |
[INFO] [stderr] 114 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]     |                                             ^                                               ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 114 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 114 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `tf_playlist` (lib) generated 6 warnings (run `cargo fix --lib -p tf_playlist` to apply 6 suggestions)
[INFO] [stderr] warning: `tf_playlist` (lib test) generated 6 warnings (6 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tf_playlist-b4230330d5271c8c)
[INFO] [stderr]    Doc-tests tf_playlist
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test playlist::test::playlist_toggle ... ok
[INFO] [stdout] test playlist_manager::test::playlistmanagerinternal_toggle_complex ... ok
[INFO] [stdout] test playlist_manager::test::playlistmanagerinternal_toggle_empty ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/playlist.rs:90:45
[INFO] [stderr]    |
[INFO] [stderr] 90 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]    |                                             ^                                               ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 90 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 90 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/playlist.rs:97:45
[INFO] [stderr]    |
[INFO] [stderr] 97 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]    |                                             ^                                               ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 97 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 97 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static>>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/playlist_manager.rs:54:45
[INFO] [stderr]    |
[INFO] [stderr] 54 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]    |                                             ^                                               ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 54 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 54 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/playlist_manager.rs:70:45
[INFO] [stderr]    |
[INFO] [stderr] 70 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]    |                                             ^                                               ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 70 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 70 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/playlist_manager.rs:106:45
[INFO] [stderr]     |
[INFO] [stderr] 106 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]     |                                             ^                                               ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 106 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 106 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/playlist_manager.rs:114:45
[INFO] [stderr]     |
[INFO] [stderr] 114 |         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr]     |                                             ^                                               ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 114 -         observer: std::sync::Weak<Mutex<Box<(dyn Observer<PlaylistEvent<T>> + Send + 'static)>>>,
[INFO] [stderr] 114 +         observer: std::sync::Weak<Mutex<Box<dyn Observer<PlaylistEvent<T>> + Send + 'static >>>,
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fe404d41347bd599af8a8d623d64b5945b8ebc0e36a094dae69b4e38236d1b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe404d41347bd599af8a8d623d64b5945b8ebc0e36a094dae69b4e38236d1b52", kill_on_drop: false }`
[INFO] [stdout] fe404d41347bd599af8a8d623d64b5945b8ebc0e36a094dae69b4e38236d1b52
