[INFO] fetching crate stoppable_thread 0.2.1...
[INFO] checking stoppable_thread-0.2.1 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate stoppable_thread 0.2.1 into /workspace/builds/worker-106/source
[INFO] validating manifest of crates.io crate stoppable_thread 0.2.1 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stoppable_thread 0.2.1
[INFO] finished tweaking crates.io crate stoppable_thread 0.2.1
[INFO] tweaked toml for crates.io crate stoppable_thread 0.2.1 written to /workspace/builds/worker-106/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9581fe0bad058e5d5418b76121dfcf517d929db320e601fdf1f1d70aea2daf79
[INFO] running `Command { std: "docker" "start" "-a" "9581fe0bad058e5d5418b76121dfcf517d929db320e601fdf1f1d70aea2daf79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9581fe0bad058e5d5418b76121dfcf517d929db320e601fdf1f1d70aea2daf79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9581fe0bad058e5d5418b76121dfcf517d929db320e601fdf1f1d70aea2daf79", kill_on_drop: false }`
[INFO] [stdout] 9581fe0bad058e5d5418b76121dfcf517d929db320e601fdf1f1d70aea2daf79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71495a9db7ee7eb8321829c80d26ad59bb758b5984b458943d311429c0cd77c2
[INFO] running `Command { std: "docker" "start" "-a" "71495a9db7ee7eb8321829c80d26ad59bb758b5984b458943d311429c0cd77c2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking stoppable_thread v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `stopping`
[INFO] [stdout]    --> src/lib.rs:225:13
[INFO] [stdout]     |
[INFO] [stdout] 225 |         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:229:13
[INFO] [stdout]     |
[INFO] [stdout] 229 |         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 [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "71495a9db7ee7eb8321829c80d26ad59bb758b5984b458943d311429c0cd77c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71495a9db7ee7eb8321829c80d26ad59bb758b5984b458943d311429c0cd77c2", kill_on_drop: false }`
[INFO] [stdout] 71495a9db7ee7eb8321829c80d26ad59bb758b5984b458943d311429c0cd77c2