[INFO] fetching crate fpool 0.5.0...
[INFO] testing fpool-0.5.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate fpool 0.5.0 into /workspace/builds/worker-57/source
[INFO] validating manifest of crates.io crate fpool 0.5.0 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 crates.io crate fpool 0.5.0
[INFO] finished tweaking crates.io crate fpool 0.5.0
[INFO] tweaked toml for crates.io crate fpool 0.5.0 written to /workspace/builds/worker-57/source/Cargo.toml
[INFO] crate crates.io crate fpool 0.5.0 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-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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] 37f6f5c61b759041ded62b44c63a984aa1215c3609609b4e41f443a79e709daa
[INFO] running `Command { std: "docker" "start" "-a" "37f6f5c61b759041ded62b44c63a984aa1215c3609609b4e41f443a79e709daa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37f6f5c61b759041ded62b44c63a984aa1215c3609609b4e41f443a79e709daa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37f6f5c61b759041ded62b44c63a984aa1215c3609609b4e41f443a79e709daa", kill_on_drop: false }`
[INFO] [stdout] 37f6f5c61b759041ded62b44c63a984aa1215c3609609b4e41f443a79e709daa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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] bfe3ab00a84d12a778e4b2429236b09b48fdc1aec86739208333528aeea6f6ba
[INFO] running `Command { std: "docker" "start" "-a" "bfe3ab00a84d12a778e4b2429236b09b48fdc1aec86739208333528aeea6f6ba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling fpool v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `Command { std: "docker" "inspect" "bfe3ab00a84d12a778e4b2429236b09b48fdc1aec86739208333528aeea6f6ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfe3ab00a84d12a778e4b2429236b09b48fdc1aec86739208333528aeea6f6ba", kill_on_drop: false }`
[INFO] [stdout] bfe3ab00a84d12a778e4b2429236b09b48fdc1aec86739208333528aeea6f6ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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] f4dc75726db86688ee241f5001a50a9968734e2801de9f6f00b32d3ab5108990
[INFO] running `Command { std: "docker" "start" "-a" "f4dc75726db86688ee241f5001a50a9968734e2801de9f6f00b32d3ab5108990", kill_on_drop: false }`
[INFO] [stderr]    Compiling fpool v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "f4dc75726db86688ee241f5001a50a9968734e2801de9f6f00b32d3ab5108990", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4dc75726db86688ee241f5001a50a9968734e2801de9f6f00b32d3ab5108990", kill_on_drop: false }`
[INFO] [stdout] f4dc75726db86688ee241f5001a50a9968734e2801de9f6f00b32d3ab5108990
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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] b2315a781ca4e8682a6674da00d0bc122990a5c20a7569a323d8e48e3d62aece
[INFO] running `Command { std: "docker" "start" "-a" "b2315a781ca4e8682a6674da00d0bc122990a5c20a7569a323d8e48e3d62aece", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/fpool-f2d002556d5c610b)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test pool::round_robin_pool::tests::refills_items_as_expected ... ok
[INFO] [stdout] test pool::round_robin_pool::tests::works_in_round_robin_fashion ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests fpool
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 19) - compile ... ok
[INFO] [stdout] test src/lib.rs - (line 27) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.64s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b2315a781ca4e8682a6674da00d0bc122990a5c20a7569a323d8e48e3d62aece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2315a781ca4e8682a6674da00d0bc122990a5c20a7569a323d8e48e3d62aece", kill_on_drop: false }`
[INFO] [stdout] b2315a781ca4e8682a6674da00d0bc122990a5c20a7569a323d8e48e3d62aece