[INFO] updating cached repository https://github.com/sombrastudios/alias_extractor
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ec799f6c0b863ef0ae01c1da50d065d8ea2447b3
[INFO] checking sombrastudios/alias_extractor against master#08dfbfb61871a83f720c6e97a3b737076e89fe3e for pr-71796
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsombrastudios%2Falias_extractor" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sombrastudios/alias_extractor on toolchain 08dfbfb61871a83f720c6e97a3b737076e89fe3e
[INFO] running `"/workspace/cargo-home/bin/cargo" "+08dfbfb61871a83f720c6e97a3b737076e89fe3e" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-9/source/Cargo.toml
[INFO] crate git repo https://github.com/sombrastudios/alias_extractor already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+08dfbfb61871a83f720c6e97a3b737076e89fe3e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+08dfbfb61871a83f720c6e97a3b737076e89fe3e" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 16a91797b039bd8b243253b7bd9a8740c9d3f57997b1389e1135af594e3c2094
[INFO] running `"docker" "start" "-a" "16a91797b039bd8b243253b7bd9a8740c9d3f57997b1389e1135af594e3c2094"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking alias_extractor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `help`
[INFO] [stderr]   --> src/main.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let help = "--help".to_string();
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_help`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `help`
[INFO] [stderr]   --> src/main.rs:30:18
[INFO] [stderr]    |
[INFO] [stderr] 30 |             Some(help) => print_help(),
[INFO] [stderr]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_help`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `help`
[INFO] [stderr]   --> src/main.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let help = "--help".to_string();
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_help`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `help`
[INFO] [stderr]   --> src/main.rs:30:18
[INFO] [stderr]    |
[INFO] [stderr] 30 |             Some(help) => print_help(),
[INFO] [stderr]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_help`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "16a91797b039bd8b243253b7bd9a8740c9d3f57997b1389e1135af594e3c2094"`
[INFO] running `"docker" "rm" "-f" "16a91797b039bd8b243253b7bd9a8740c9d3f57997b1389e1135af594e3c2094"`
[INFO] [stdout] 16a91797b039bd8b243253b7bd9a8740c9d3f57997b1389e1135af594e3c2094