[INFO] fetching crate mentor 0.1.0...
[INFO] testing mentor-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mentor 0.1.0 into /workspace/builds/worker-63/source
[INFO] validating manifest of crates.io crate mentor 0.1.0 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 crates.io crate mentor 0.1.0
[INFO] finished tweaking crates.io crate mentor 0.1.0
[INFO] tweaked toml for crates.io crate mentor 0.1.0 written to /workspace/builds/worker-63/source/Cargo.toml
[INFO] crate crates.io crate mentor 0.1.0 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-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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] 4e831d3e6159008a1aa2ab86a0049363ca276a0fd6a4a9308c3135dbfd230428
[INFO] running `Command { std: "docker" "start" "-a" "4e831d3e6159008a1aa2ab86a0049363ca276a0fd6a4a9308c3135dbfd230428", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e831d3e6159008a1aa2ab86a0049363ca276a0fd6a4a9308c3135dbfd230428", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e831d3e6159008a1aa2ab86a0049363ca276a0fd6a4a9308c3135dbfd230428", kill_on_drop: false }`
[INFO] [stdout] 4e831d3e6159008a1aa2ab86a0049363ca276a0fd6a4a9308c3135dbfd230428
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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] 29c865711d4f44fb4ec9c0501a221e29c98b4de73ab65e33a1f176d57eebf109
[INFO] running `Command { std: "docker" "start" "-a" "29c865711d4f44fb4ec9c0501a221e29c98b4de73ab65e33a1f176d57eebf109", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mentor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.25s
[INFO] running `Command { std: "docker" "inspect" "29c865711d4f44fb4ec9c0501a221e29c98b4de73ab65e33a1f176d57eebf109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29c865711d4f44fb4ec9c0501a221e29c98b4de73ab65e33a1f176d57eebf109", kill_on_drop: false }`
[INFO] [stdout] 29c865711d4f44fb4ec9c0501a221e29c98b4de73ab65e33a1f176d57eebf109
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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] 0bc0a910a0fd1158d92f78dc92050559fa152be53d199a77c4bb4c74562f12d3
[INFO] running `Command { std: "docker" "start" "-a" "0bc0a910a0fd1158d92f78dc92050559fa152be53d199a77c4bb4c74562f12d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling mentor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "0bc0a910a0fd1158d92f78dc92050559fa152be53d199a77c4bb4c74562f12d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bc0a910a0fd1158d92f78dc92050559fa152be53d199a77c4bb4c74562f12d3", kill_on_drop: false }`
[INFO] [stdout] 0bc0a910a0fd1158d92f78dc92050559fa152be53d199a77c4bb4c74562f12d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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] 2e1ab3783a71c17dba8004c26f99b3accebc9f21c117fc26670e1c4be84b1a5e
[INFO] running `Command { std: "docker" "start" "-a" "2e1ab3783a71c17dba8004c26f99b3accebc9f21c117fc26670e1c4be84b1a5e", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mentor-ff0367a234c100b3)
[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" "2e1ab3783a71c17dba8004c26f99b3accebc9f21c117fc26670e1c4be84b1a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e1ab3783a71c17dba8004c26f99b3accebc9f21c117fc26670e1c4be84b1a5e", kill_on_drop: false }`
[INFO] [stdout] 2e1ab3783a71c17dba8004c26f99b3accebc9f21c117fc26670e1c4be84b1a5e