[INFO] cloning repository https://github.com/maksimil/matgrap
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maksimil/matgrap" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaksimil%2Fmatgrap", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaksimil%2Fmatgrap'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0b6d131d6aa6db27cf3aad3df24d017bc0f7c2fa
[INFO] testing maksimil/matgrap 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%2Fmaksimil%2Fmatgrap" "/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/maksimil/matgrap 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/maksimil/matgrap
[INFO] finished tweaking git repo https://github.com/maksimil/matgrap
[INFO] tweaked toml for git repo https://github.com/maksimil/matgrap written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/maksimil/matgrap 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-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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c7b4713199e9a8d42cf8f8eb0325fc4cc99baa1a1bf19d55cdbac5104e01f0ac
[INFO] running `Command { std: "docker" "start" "-a" "c7b4713199e9a8d42cf8f8eb0325fc4cc99baa1a1bf19d55cdbac5104e01f0ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7b4713199e9a8d42cf8f8eb0325fc4cc99baa1a1bf19d55cdbac5104e01f0ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7b4713199e9a8d42cf8f8eb0325fc4cc99baa1a1bf19d55cdbac5104e01f0ac", kill_on_drop: false }`
[INFO] [stdout] c7b4713199e9a8d42cf8f8eb0325fc4cc99baa1a1bf19d55cdbac5104e01f0ac
[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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 938fd82d38fb7fb3fd005b9f84fbe0e8c8d1ac947c0028d3e4f1c33895ca5032
[INFO] running `Command { std: "docker" "start" "-a" "938fd82d38fb7fb3fd005b9f84fbe0e8c8d1ac947c0028d3e4f1c33895ca5032", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling matgrap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.36s
[INFO] running `Command { std: "docker" "inspect" "938fd82d38fb7fb3fd005b9f84fbe0e8c8d1ac947c0028d3e4f1c33895ca5032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "938fd82d38fb7fb3fd005b9f84fbe0e8c8d1ac947c0028d3e4f1c33895ca5032", kill_on_drop: false }`
[INFO] [stdout] 938fd82d38fb7fb3fd005b9f84fbe0e8c8d1ac947c0028d3e4f1c33895ca5032
[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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29d2d038d4152e611f827b1ef56532a1d25c6c65885ef089643d34bcbe6699b9
[INFO] running `Command { std: "docker" "start" "-a" "29d2d038d4152e611f827b1ef56532a1d25c6c65885ef089643d34bcbe6699b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling matgrap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "29d2d038d4152e611f827b1ef56532a1d25c6c65885ef089643d34bcbe6699b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29d2d038d4152e611f827b1ef56532a1d25c6c65885ef089643d34bcbe6699b9", kill_on_drop: false }`
[INFO] [stdout] 29d2d038d4152e611f827b1ef56532a1d25c6c65885ef089643d34bcbe6699b9
[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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 700d43fe04be7ec2fc80d391ffa3e92cef071ba6d5b19cfc7a3d1a3d2e5ab821
[INFO] running `Command { std: "docker" "start" "-a" "700d43fe04be7ec2fc80d391ffa3e92cef071ba6d5b19cfc7a3d1a3d2e5ab821", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 10 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout] 
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `matgrap` (bin "matgrap" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/matgrap-114e78775667d19b)
[INFO] running `Command { std: "docker" "inspect" "700d43fe04be7ec2fc80d391ffa3e92cef071ba6d5b19cfc7a3d1a3d2e5ab821", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "700d43fe04be7ec2fc80d391ffa3e92cef071ba6d5b19cfc7a3d1a3d2e5ab821", kill_on_drop: false }`
[INFO] [stdout] 700d43fe04be7ec2fc80d391ffa3e92cef071ba6d5b19cfc7a3d1a3d2e5ab821