[INFO] cloning repository https://github.com/timm1k/rust_string_slices_training
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/timm1k/rust_string_slices_training" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimm1k%2Frust_string_slices_training", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimm1k%2Frust_string_slices_training'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6abfd47938bb1e99e53cd5a4087cd54f566130a
[INFO] testing timm1k/rust_string_slices_training against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimm1k%2Frust_string_slices_training" "/workspace/builds/worker-108/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-108/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/timm1k/rust_string_slices_training on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/timm1k/rust_string_slices_training
[INFO] finished tweaking git repo https://github.com/timm1k/rust_string_slices_training
[INFO] tweaked toml for git repo https://github.com/timm1k/rust_string_slices_training written to /workspace/builds/worker-108/source/Cargo.toml
[INFO] crate git repo https://github.com/timm1k/rust_string_slices_training already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 666916dd18f20072f9dead6d592dcf49a127c32be8d29724abd2f362e7f1cc28
[INFO] running `Command { std: "docker" "start" "-a" "666916dd18f20072f9dead6d592dcf49a127c32be8d29724abd2f362e7f1cc28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "666916dd18f20072f9dead6d592dcf49a127c32be8d29724abd2f362e7f1cc28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "666916dd18f20072f9dead6d592dcf49a127c32be8d29724abd2f362e7f1cc28", kill_on_drop: false }`
[INFO] [stdout] 666916dd18f20072f9dead6d592dcf49a127c32be8d29724abd2f362e7f1cc28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f98e23b85eadb69d579f26595e545d7d2095b0d0a733310b4961f4d03df7754
[INFO] running `Command { std: "docker" "start" "-a" "8f98e23b85eadb69d579f26595e545d7d2095b0d0a733310b4961f4d03df7754", kill_on_drop: false }`
[INFO] [stderr]    Compiling first_word v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `Command { std: "docker" "inspect" "8f98e23b85eadb69d579f26595e545d7d2095b0d0a733310b4961f4d03df7754", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f98e23b85eadb69d579f26595e545d7d2095b0d0a733310b4961f4d03df7754", kill_on_drop: false }`
[INFO] [stdout] 8f98e23b85eadb69d579f26595e545d7d2095b0d0a733310b4961f4d03df7754
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e91907bc720eb8cb52820753231b77f5c680525ca095c8dd4c3d4ee279e1c10d
[INFO] running `Command { std: "docker" "start" "-a" "e91907bc720eb8cb52820753231b77f5c680525ca095c8dd4c3d4ee279e1c10d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling first_word v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.65s
[INFO] running `Command { std: "docker" "inspect" "e91907bc720eb8cb52820753231b77f5c680525ca095c8dd4c3d4ee279e1c10d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e91907bc720eb8cb52820753231b77f5c680525ca095c8dd4c3d4ee279e1c10d", kill_on_drop: false }`
[INFO] [stdout] e91907bc720eb8cb52820753231b77f5c680525ca095c8dd4c3d4ee279e1c10d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 874b6e300ecabf635014f99400ef6a60c3797ff4c4853bcb0a07daa994fdf413
[INFO] running `Command { std: "docker" "start" "-a" "874b6e300ecabf635014f99400ef6a60c3797ff4c4853bcb0a07daa994fdf413", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.08s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/first_word-0a02476b7c4e0ce7)
[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" "874b6e300ecabf635014f99400ef6a60c3797ff4c4853bcb0a07daa994fdf413", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "874b6e300ecabf635014f99400ef6a60c3797ff4c4853bcb0a07daa994fdf413", kill_on_drop: false }`
[INFO] [stdout] 874b6e300ecabf635014f99400ef6a60c3797ff4c4853bcb0a07daa994fdf413