[INFO] cloning repository https://github.com/Trojkev/rust-learner
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Trojkev/rust-learner" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrojkev%2Frust-learner", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrojkev%2Frust-learner'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac236efcbc844350cdc7179116057eb4763bce65
[INFO] testing Trojkev/rust-learner against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrojkev%2Frust-learner" "/workspace/builds/worker-55/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-55/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Trojkev/rust-learner 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 git repo https://github.com/Trojkev/rust-learner
[INFO] finished tweaking git repo https://github.com/Trojkev/rust-learner
[INFO] tweaked toml for git repo https://github.com/Trojkev/rust-learner written to /workspace/builds/worker-55/source/Cargo.toml
[INFO] crate git repo https://github.com/Trojkev/rust-learner already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] 6eb2cd0affce2feb3a4c9884bc66721ad6d40db6713cb2e2efc8a1bdcb3f2f18
[INFO] running `Command { std: "docker" "start" "-a" "6eb2cd0affce2feb3a4c9884bc66721ad6d40db6713cb2e2efc8a1bdcb3f2f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6eb2cd0affce2feb3a4c9884bc66721ad6d40db6713cb2e2efc8a1bdcb3f2f18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eb2cd0affce2feb3a4c9884bc66721ad6d40db6713cb2e2efc8a1bdcb3f2f18", kill_on_drop: false }`
[INFO] [stdout] 6eb2cd0affce2feb3a4c9884bc66721ad6d40db6713cb2e2efc8a1bdcb3f2f18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] c3f71d232d51ca6eefca9b619fdf119eae853eaa25125b462515800a15c76ee5
[INFO] running `Command { std: "docker" "start" "-a" "c3f71d232d51ca6eefca9b619fdf119eae853eaa25125b462515800a15c76ee5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-learner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.49s
[INFO] running `Command { std: "docker" "inspect" "c3f71d232d51ca6eefca9b619fdf119eae853eaa25125b462515800a15c76ee5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3f71d232d51ca6eefca9b619fdf119eae853eaa25125b462515800a15c76ee5", kill_on_drop: false }`
[INFO] [stdout] c3f71d232d51ca6eefca9b619fdf119eae853eaa25125b462515800a15c76ee5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] 6bbb39a5294160d00e5ad3def4d4ea7cc528e9cd4c3afe419f219fca5bf84959
[INFO] running `Command { std: "docker" "start" "-a" "6bbb39a5294160d00e5ad3def4d4ea7cc528e9cd4c3afe419f219fca5bf84959", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-learner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "6bbb39a5294160d00e5ad3def4d4ea7cc528e9cd4c3afe419f219fca5bf84959", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bbb39a5294160d00e5ad3def4d4ea7cc528e9cd4c3afe419f219fca5bf84959", kill_on_drop: false }`
[INFO] [stdout] 6bbb39a5294160d00e5ad3def4d4ea7cc528e9cd4c3afe419f219fca5bf84959
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] 33cb8c7056ab0154b5be25306453df379671aac9b801e44b94eeb55471a6a72b
[INFO] running `Command { std: "docker" "start" "-a" "33cb8c7056ab0154b5be25306453df379671aac9b801e44b94eeb55471a6a72b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.60s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_learner-211b9df50563be59)
[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" "33cb8c7056ab0154b5be25306453df379671aac9b801e44b94eeb55471a6a72b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33cb8c7056ab0154b5be25306453df379671aac9b801e44b94eeb55471a6a72b", kill_on_drop: false }`
[INFO] [stdout] 33cb8c7056ab0154b5be25306453df379671aac9b801e44b94eeb55471a6a72b