[INFO] fetching crate workerpool 1.1.1...
[INFO] extracting crate workerpool 1.1.1 into work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/workerpool/1.1.1
[INFO] extracting crate workerpool 1.1.1 into work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/workerpool/1.1.1
[INFO] validating manifest of workerpool-1.1.1 on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of workerpool-1.1.1 on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing workerpool-1.1.1
[INFO] finished frobbing workerpool-1.1.1
[INFO] frobbed toml for workerpool-1.1.1 written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/workerpool/1.1.1/Cargo.toml
[INFO] started frobbing workerpool-1.1.1
[INFO] finished frobbing workerpool-1.1.1
[INFO] frobbed toml for workerpool-1.1.1 written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/workerpool/1.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking workerpool-1.1.1 against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-6/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/workerpool/1.1.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ac3a740d5f83bb2cf7a9e6341aef57d4dfaf6b5d748c9b84a5430035729a610b
[INFO] running `"docker" "start" "-a" "ac3a740d5f83bb2cf7a9e6341aef57d4dfaf6b5d748c9b84a5430035729a610b"`
[INFO] [stderr]     Checking workerpool v1.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]     --> src/lib.rs:1070:46
[INFO] [stderr]      |
[INFO] [stderr] 1070 |             pool.execute(Thunk::of(move || { 1 + 1; }));
[INFO] [stderr]      |                                              ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "ac3a740d5f83bb2cf7a9e6341aef57d4dfaf6b5d748c9b84a5430035729a610b"`
[INFO] running `"docker" "rm" "-f" "ac3a740d5f83bb2cf7a9e6341aef57d4dfaf6b5d748c9b84a5430035729a610b"`
[INFO] [stdout] ac3a740d5f83bb2cf7a9e6341aef57d4dfaf6b5d748c9b84a5430035729a610b