[INFO] cloning repository https://github.com/Gitter499/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/Gitter499/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGitter499%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGitter499%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b858e2a8b5f9a0ba27d4b86ac48a1f6a66cef0f5
[INFO] testing Gitter499/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%2FGitter499%2Frust-learning" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Gitter499/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/Gitter499/rust-learning
[INFO] finished tweaking git repo https://github.com/Gitter499/rust-learning
[INFO] tweaked toml for git repo https://github.com/Gitter499/rust-learning written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/Gitter499/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] [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-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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] 6c4fea27a5d886e44e62ec49d78cea49cc3cef51e8c70d5bedc10b6f68c05f2c
[INFO] running `Command { std: "docker" "start" "-a" "6c4fea27a5d886e44e62ec49d78cea49cc3cef51e8c70d5bedc10b6f68c05f2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c4fea27a5d886e44e62ec49d78cea49cc3cef51e8c70d5bedc10b6f68c05f2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c4fea27a5d886e44e62ec49d78cea49cc3cef51e8c70d5bedc10b6f68c05f2c", kill_on_drop: false }`
[INFO] [stdout] 6c4fea27a5d886e44e62ec49d78cea49cc3cef51e8c70d5bedc10b6f68c05f2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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] 6dd7f9fc9f5dec4e81be63ec23a0e970330f7725e8366e5be13248dca7539737
[INFO] running `Command { std: "docker" "start" "-a" "6dd7f9fc9f5dec4e81be63ec23a0e970330f7725e8366e5be13248dca7539737", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.74s
[INFO] running `Command { std: "docker" "inspect" "6dd7f9fc9f5dec4e81be63ec23a0e970330f7725e8366e5be13248dca7539737", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dd7f9fc9f5dec4e81be63ec23a0e970330f7725e8366e5be13248dca7539737", kill_on_drop: false }`
[INFO] [stdout] 6dd7f9fc9f5dec4e81be63ec23a0e970330f7725e8366e5be13248dca7539737
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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] 93409673b8360fb0e1df3e4d7048bbdb358c1828a8c5a7c33091f2d8a17735b8
[INFO] running `Command { std: "docker" "start" "-a" "93409673b8360fb0e1df3e4d7048bbdb358c1828a8c5a7c33091f2d8a17735b8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 8.70s
[INFO] running `Command { std: "docker" "inspect" "93409673b8360fb0e1df3e4d7048bbdb358c1828a8c5a7c33091f2d8a17735b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93409673b8360fb0e1df3e4d7048bbdb358c1828a8c5a7c33091f2d8a17735b8", kill_on_drop: false }`
[INFO] [stdout] 93409673b8360fb0e1df3e4d7048bbdb358c1828a8c5a7c33091f2d8a17735b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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] 7243d8ba2db4d7332c17148a350efcc7e052ba753f089e0532da40674f1781c0
[INFO] running `Command { std: "docker" "start" "-a" "7243d8ba2db4d7332c17148a350efcc7e052ba753f089e0532da40674f1781c0", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_learning-6bcbcd8ed1899be7)
[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" "7243d8ba2db4d7332c17148a350efcc7e052ba753f089e0532da40674f1781c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7243d8ba2db4d7332c17148a350efcc7e052ba753f089e0532da40674f1781c0", kill_on_drop: false }`
[INFO] [stdout] 7243d8ba2db4d7332c17148a350efcc7e052ba753f089e0532da40674f1781c0