[INFO] fetching crate best 0.13.0...
[INFO] testing best-0.13.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate best 0.13.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate best 0.13.0 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 best 0.13.0
[INFO] finished tweaking crates.io crate best 0.13.0
[INFO] tweaked toml for crates.io crate best 0.13.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 1f4463f03c6362584cad38a147fcd2c9faae5f051d062c3fdc0bbc1a7ce58c57
[INFO] running `Command { std: "docker" "start" "-a" "1f4463f03c6362584cad38a147fcd2c9faae5f051d062c3fdc0bbc1a7ce58c57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f4463f03c6362584cad38a147fcd2c9faae5f051d062c3fdc0bbc1a7ce58c57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f4463f03c6362584cad38a147fcd2c9faae5f051d062c3fdc0bbc1a7ce58c57", kill_on_drop: false }`
[INFO] [stdout] 1f4463f03c6362584cad38a147fcd2c9faae5f051d062c3fdc0bbc1a7ce58c57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] c9890a98be40e094e06d0f042b3f46da3716ccae1f1915b69d4a849f2fa4e9f1
[INFO] running `Command { std: "docker" "start" "-a" "c9890a98be40e094e06d0f042b3f46da3716ccae1f1915b69d4a849f2fa4e9f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling best v0.13.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "c9890a98be40e094e06d0f042b3f46da3716ccae1f1915b69d4a849f2fa4e9f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9890a98be40e094e06d0f042b3f46da3716ccae1f1915b69d4a849f2fa4e9f1", kill_on_drop: false }`
[INFO] [stdout] c9890a98be40e094e06d0f042b3f46da3716ccae1f1915b69d4a849f2fa4e9f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] d8c3fa12d0c8965b7c65385d60185651ae606e023f7b40fa83c43f387e52217e
[INFO] running `Command { std: "docker" "start" "-a" "d8c3fa12d0c8965b7c65385d60185651ae606e023f7b40fa83c43f387e52217e", kill_on_drop: false }`
[INFO] [stderr]    Compiling best v0.13.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "d8c3fa12d0c8965b7c65385d60185651ae606e023f7b40fa83c43f387e52217e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8c3fa12d0c8965b7c65385d60185651ae606e023f7b40fa83c43f387e52217e", kill_on_drop: false }`
[INFO] [stdout] d8c3fa12d0c8965b7c65385d60185651ae606e023f7b40fa83c43f387e52217e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 8fc7650480bf64a6337be957e3ba3a9798d83c5859ade91360f8f78cc0ce8f06
[INFO] running `Command { std: "docker" "start" "-a" "8fc7650480bf64a6337be957e3ba3a9798d83c5859ade91360f8f78cc0ce8f06", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/best-7273f471ca6abdb8)
[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] [stderr]    Doc-tests best
[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" "8fc7650480bf64a6337be957e3ba3a9798d83c5859ade91360f8f78cc0ce8f06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fc7650480bf64a6337be957e3ba3a9798d83c5859ade91360f8f78cc0ce8f06", kill_on_drop: false }`
[INFO] [stdout] 8fc7650480bf64a6337be957e3ba3a9798d83c5859ade91360f8f78cc0ce8f06