[INFO] cloning repository https://github.com/tominekan/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tominekan/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftominekan%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftominekan%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac659b3410bdc5df7b068f481f2bfcf05c2cb28a
[INFO] testing tominekan/rust_learning against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftominekan%2Frust_learning" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tominekan/rust_learning 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/tominekan/rust_learning
[INFO] finished tweaking git repo https://github.com/tominekan/rust_learning
[INFO] tweaked toml for git repo https://github.com/tominekan/rust_learning written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/tominekan/rust_learning 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 88cc0c397e29f14addd0f48ffde88ba1563389aa3497d1ffb256bb9b3c4bb69f
[INFO] running `Command { std: "docker" "start" "-a" "88cc0c397e29f14addd0f48ffde88ba1563389aa3497d1ffb256bb9b3c4bb69f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88cc0c397e29f14addd0f48ffde88ba1563389aa3497d1ffb256bb9b3c4bb69f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88cc0c397e29f14addd0f48ffde88ba1563389aa3497d1ffb256bb9b3c4bb69f", kill_on_drop: false }`
[INFO] [stdout] 88cc0c397e29f14addd0f48ffde88ba1563389aa3497d1ffb256bb9b3c4bb69f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] e47ba767d9c908d5f19110b6962d2b9d1025bdfa9184260765adf51e4840284e
[INFO] running `Command { std: "docker" "start" "-a" "e47ba767d9c908d5f19110b6962d2b9d1025bdfa9184260765adf51e4840284e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling termion v1.5.6
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.66s
[INFO] running `Command { std: "docker" "inspect" "e47ba767d9c908d5f19110b6962d2b9d1025bdfa9184260765adf51e4840284e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e47ba767d9c908d5f19110b6962d2b9d1025bdfa9184260765adf51e4840284e", kill_on_drop: false }`
[INFO] [stdout] e47ba767d9c908d5f19110b6962d2b9d1025bdfa9184260765adf51e4840284e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] f5eeb4c97ed02acad4c28ce180c8107166e8ad6d777b501c77c6568692f12452
[INFO] running `Command { std: "docker" "start" "-a" "f5eeb4c97ed02acad4c28ce180c8107166e8ad6d777b501c77c6568692f12452", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "f5eeb4c97ed02acad4c28ce180c8107166e8ad6d777b501c77c6568692f12452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5eeb4c97ed02acad4c28ce180c8107166e8ad6d777b501c77c6568692f12452", kill_on_drop: false }`
[INFO] [stdout] f5eeb4c97ed02acad4c28ce180c8107166e8ad6d777b501c77c6568692f12452
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 85bfa64b669a317b13e1236fa46eecea69b1b713ea8f986e05cdc74ecc8587ff
[INFO] running `Command { std: "docker" "start" "-a" "85bfa64b669a317b13e1236fa46eecea69b1b713ea8f986e05cdc74ecc8587ff", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/learn_rust-6b22cb7e1ed04a3d)
[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" "85bfa64b669a317b13e1236fa46eecea69b1b713ea8f986e05cdc74ecc8587ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85bfa64b669a317b13e1236fa46eecea69b1b713ea8f986e05cdc74ecc8587ff", kill_on_drop: false }`
[INFO] [stdout] 85bfa64b669a317b13e1236fa46eecea69b1b713ea8f986e05cdc74ecc8587ff