[INFO] cloning repository https://github.com/timglabisch/rust_leaking_threadpool
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/timglabisch/rust_leaking_threadpool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimglabisch%2Frust_leaking_threadpool", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimglabisch%2Frust_leaking_threadpool'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4eecd5fad12568f3bb1a1e2ee8292886422dda38
[INFO] testing timglabisch/rust_leaking_threadpool against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimglabisch%2Frust_leaking_threadpool" "/workspace/builds/worker-47/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-47/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/timglabisch/rust_leaking_threadpool on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/timglabisch/rust_leaking_threadpool
[INFO] finished tweaking git repo https://github.com/timglabisch/rust_leaking_threadpool
[INFO] tweaked toml for git repo https://github.com/timglabisch/rust_leaking_threadpool written to /workspace/builds/worker-47/source/Cargo.toml
[INFO] crate git repo https://github.com/timglabisch/rust_leaking_threadpool already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ee43ddb09326709bd7fb477718e3240538d9479cf7bbe36394b21b5e7849bc8
[INFO] running `Command { std: "docker" "start" "-a" "8ee43ddb09326709bd7fb477718e3240538d9479cf7bbe36394b21b5e7849bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ee43ddb09326709bd7fb477718e3240538d9479cf7bbe36394b21b5e7849bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ee43ddb09326709bd7fb477718e3240538d9479cf7bbe36394b21b5e7849bc8", kill_on_drop: false }`
[INFO] [stdout] 8ee43ddb09326709bd7fb477718e3240538d9479cf7bbe36394b21b5e7849bc8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 84a39e37b237f5dedcb96a8deceb43390016d2d6d8375c545d2f76c4d766ba07
[INFO] running `Command { std: "docker" "start" "-a" "84a39e37b237f5dedcb96a8deceb43390016d2d6d8375c545d2f76c4d766ba07", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling threadpool v1.3.1
[INFO] [stderr]    Compiling threadpool_leak v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `foo`
[INFO] [stdout]   --> src/main.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |             let foo = (0..1000000).map(|_| "X").collect::<String>();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.82s
[INFO] running `Command { std: "docker" "inspect" "84a39e37b237f5dedcb96a8deceb43390016d2d6d8375c545d2f76c4d766ba07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84a39e37b237f5dedcb96a8deceb43390016d2d6d8375c545d2f76c4d766ba07", kill_on_drop: false }`
[INFO] [stdout] 84a39e37b237f5dedcb96a8deceb43390016d2d6d8375c545d2f76c4d766ba07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4790aafc86d23e75f274fac5b8aa35a2b898c603d68da0dce13e38780ac3c7cf
[INFO] running `Command { std: "docker" "start" "-a" "4790aafc86d23e75f274fac5b8aa35a2b898c603d68da0dce13e38780ac3c7cf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling threadpool_leak v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `foo`
[INFO] [stdout]   --> src/main.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |             let foo = (0..1000000).map(|_| "X").collect::<String>();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.76s
[INFO] running `Command { std: "docker" "inspect" "4790aafc86d23e75f274fac5b8aa35a2b898c603d68da0dce13e38780ac3c7cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4790aafc86d23e75f274fac5b8aa35a2b898c603d68da0dce13e38780ac3c7cf", kill_on_drop: false }`
[INFO] [stdout] 4790aafc86d23e75f274fac5b8aa35a2b898c603d68da0dce13e38780ac3c7cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6be7fe8b6e6e4262cf259de885007397ad20c0838b7a0fe283ace402ec2cd698
[INFO] running `Command { std: "docker" "start" "-a" "6be7fe8b6e6e4262cf259de885007397ad20c0838b7a0fe283ace402ec2cd698", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `foo`
[INFO] [stderr]   --> src/main.rs:15:17
[INFO] [stderr]    |
[INFO] [stderr] 15 |             let foo = (0..1000000).map(|_| "X").collect::<String>();
[INFO] [stderr]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `threadpool_leak` (bin "threadpool_leak" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/threadpool_leak-fe0c606b6f9af631)
[INFO] [stdout] 
[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" "6be7fe8b6e6e4262cf259de885007397ad20c0838b7a0fe283ace402ec2cd698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6be7fe8b6e6e4262cf259de885007397ad20c0838b7a0fe283ace402ec2cd698", kill_on_drop: false }`
[INFO] [stdout] 6be7fe8b6e6e4262cf259de885007397ad20c0838b7a0fe283ace402ec2cd698