[INFO] cloning repository https://github.com/kvntng17/rust_playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kvntng17/rust_playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvntng17%2Frust_playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvntng17%2Frust_playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 241667d4f2ec18a49e3b26034ca4f9b4f0e8f8fe
[INFO] testing kvntng17/rust_playground against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkvntng17%2Frust_playground" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kvntng17/rust_playground 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/kvntng17/rust_playground
[INFO] finished tweaking git repo https://github.com/kvntng17/rust_playground
[INFO] tweaked toml for git repo https://github.com/kvntng17/rust_playground written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/kvntng17/rust_playground 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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 52ddecbe6736a3168014875443b3577edff2f60e727bfc14ac4e37073f53ebb0
[INFO] running `Command { std: "docker" "start" "-a" "52ddecbe6736a3168014875443b3577edff2f60e727bfc14ac4e37073f53ebb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52ddecbe6736a3168014875443b3577edff2f60e727bfc14ac4e37073f53ebb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52ddecbe6736a3168014875443b3577edff2f60e727bfc14ac4e37073f53ebb0", kill_on_drop: false }`
[INFO] [stdout] 52ddecbe6736a3168014875443b3577edff2f60e727bfc14ac4e37073f53ebb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] a7c7bab7b4671c658e56fffe226e94502569e38e33afe8f3571ffc566baf1a88
[INFO] running `Command { std: "docker" "start" "-a" "a7c7bab7b4671c658e56fffe226e94502569e38e33afe8f3571ffc566baf1a88", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "a7c7bab7b4671c658e56fffe226e94502569e38e33afe8f3571ffc566baf1a88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7c7bab7b4671c658e56fffe226e94502569e38e33afe8f3571ffc566baf1a88", kill_on_drop: false }`
[INFO] [stdout] a7c7bab7b4671c658e56fffe226e94502569e38e33afe8f3571ffc566baf1a88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] fb1be107ca0276496233b589b31d53800367ca3c0c9a21c0752c25df7fdf7fc3
[INFO] running `Command { std: "docker" "start" "-a" "fb1be107ca0276496233b589b31d53800367ca3c0c9a21c0752c25df7fdf7fc3", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "fb1be107ca0276496233b589b31d53800367ca3c0c9a21c0752c25df7fdf7fc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb1be107ca0276496233b589b31d53800367ca3c0c9a21c0752c25df7fdf7fc3", kill_on_drop: false }`
[INFO] [stdout] fb1be107ca0276496233b589b31d53800367ca3c0c9a21c0752c25df7fdf7fc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 0a9e4fe4a1ef3bad17525175b35875fa7885d9fe567dba40dfb504ddf60d7ba5
[INFO] running `Command { std: "docker" "start" "-a" "0a9e4fe4a1ef3bad17525175b35875fa7885d9fe567dba40dfb504ddf60d7ba5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.21s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_playground-aa2be53c27fe9d5f)
[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" "0a9e4fe4a1ef3bad17525175b35875fa7885d9fe567dba40dfb504ddf60d7ba5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a9e4fe4a1ef3bad17525175b35875fa7885d9fe567dba40dfb504ddf60d7ba5", kill_on_drop: false }`
[INFO] [stdout] 0a9e4fe4a1ef3bad17525175b35875fa7885d9fe567dba40dfb504ddf60d7ba5