[INFO] fetching crate killable_thread 0.2.2...
[INFO] checking killable_thread-0.2.2 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate killable_thread 0.2.2 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate killable_thread 0.2.2 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate killable_thread 0.2.2
[INFO] finished tweaking crates.io crate killable_thread 0.2.2
[INFO] tweaked toml for crates.io crate killable_thread 0.2.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8738e3f89195d55ed41fe63d28eed441fbff607d95fc1a33d83a544b399e3235
[INFO] running `Command { std: "docker" "start" "-a" "8738e3f89195d55ed41fe63d28eed441fbff607d95fc1a33d83a544b399e3235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8738e3f89195d55ed41fe63d28eed441fbff607d95fc1a33d83a544b399e3235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8738e3f89195d55ed41fe63d28eed441fbff607d95fc1a33d83a544b399e3235", kill_on_drop: false }`
[INFO] [stdout] 8738e3f89195d55ed41fe63d28eed441fbff607d95fc1a33d83a544b399e3235
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f511573220edf856e3ece662641eb7b95d49a372aff08af9495dbffae35c8c9
[INFO] running `Command { std: "docker" "start" "-a" "4f511573220edf856e3ece662641eb7b95d49a372aff08af9495dbffae35c8c9", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking killable_thread v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `stopping`
[INFO] [stdout]    --> src/lib.rs:235:13
[INFO] [stdout]     |
[INFO] [stdout] 235 |         let stopping = Stopping::new(spawn(move |stopped|
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stopping`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `joining`
[INFO] [stdout]    --> src/lib.rs:239:13
[INFO] [stdout]     |
[INFO] [stdout] 239 |         let joining = Joining::new(spawn(move |stopped|
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_joining`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "4f511573220edf856e3ece662641eb7b95d49a372aff08af9495dbffae35c8c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f511573220edf856e3ece662641eb7b95d49a372aff08af9495dbffae35c8c9", kill_on_drop: false }`
[INFO] [stdout] 4f511573220edf856e3ece662641eb7b95d49a372aff08af9495dbffae35c8c9