[INFO] cloning repository https://github.com/sombrastudios/alias_extractor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sombrastudios/alias_extractor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsombrastudios%2Falias_extractor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsombrastudios%2Falias_extractor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec799f6c0b863ef0ae01c1da50d065d8ea2447b3
[INFO] checking sombrastudios/alias_extractor against master#c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsombrastudios%2Falias_extractor" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sombrastudios/alias_extractor on toolchain c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sombrastudios/alias_extractor
[INFO] finished tweaking git repo https://github.com/sombrastudios/alias_extractor
[INFO] tweaked toml for git repo https://github.com/sombrastudios/alias_extractor written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sombrastudios/alias_extractor already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9719f3085b1a1e930fb35fa8275df562ae09479176a8fe67314c9668aaca5c07
[INFO] running `Command { std: "docker" "start" "-a" "9719f3085b1a1e930fb35fa8275df562ae09479176a8fe67314c9668aaca5c07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9719f3085b1a1e930fb35fa8275df562ae09479176a8fe67314c9668aaca5c07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9719f3085b1a1e930fb35fa8275df562ae09479176a8fe67314c9668aaca5c07", kill_on_drop: false }`
[INFO] [stdout] 9719f3085b1a1e930fb35fa8275df562ae09479176a8fe67314c9668aaca5c07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c90d18c00d2f36b8eb7c0d9300d1ec9ad5321831fda960d3986bfc47ec5cfffe
[INFO] running `Command { std: "docker" "start" "-a" "c90d18c00d2f36b8eb7c0d9300d1ec9ad5321831fda960d3986bfc47ec5cfffe", kill_on_drop: false }`
[INFO] [stderr]     Checking alias_extractor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `help`
[INFO] [stdout]   --> src/main.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let help = "--help".to_string();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_help`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `help`
[INFO] [stdout]   --> src/main.rs:30:18
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Some(help) => print_help(),
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_help`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `help`
[INFO] [stdout]   --> src/main.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let help = "--help".to_string();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_help`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `help`
[INFO] [stdout]   --> src/main.rs:30:18
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Some(help) => print_help(),
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_help`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "c90d18c00d2f36b8eb7c0d9300d1ec9ad5321831fda960d3986bfc47ec5cfffe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c90d18c00d2f36b8eb7c0d9300d1ec9ad5321831fda960d3986bfc47ec5cfffe", kill_on_drop: false }`
[INFO] [stdout] c90d18c00d2f36b8eb7c0d9300d1ec9ad5321831fda960d3986bfc47ec5cfffe