[INFO] cloning repository https://github.com/makos/rust-ls
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/makos/rust-ls" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakos%2Frust-ls", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakos%2Frust-ls'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d208dbb34473661147939858a3a29a3f7195ad62
[INFO] checking makos/rust-ls against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmakos%2Frust-ls" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/makos/rust-ls on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/makos/rust-ls
[INFO] finished tweaking git repo https://github.com/makos/rust-ls
[INFO] tweaked toml for git repo https://github.com/makos/rust-ls written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/makos/rust-ls already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14b85c54058b9bf7b84b5e6d38037c508ecc79732ecae7dd174b1566c6791b92
[INFO] running `Command { std: "docker" "start" "-a" "14b85c54058b9bf7b84b5e6d38037c508ecc79732ecae7dd174b1566c6791b92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14b85c54058b9bf7b84b5e6d38037c508ecc79732ecae7dd174b1566c6791b92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14b85c54058b9bf7b84b5e6d38037c508ecc79732ecae7dd174b1566c6791b92", kill_on_drop: false }`
[INFO] [stdout] 14b85c54058b9bf7b84b5e6d38037c508ecc79732ecae7dd174b1566c6791b92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcf996908b228aafffe734e9c80705c96d622f80b307a3e5e7d9d336ce11f2ef
[INFO] running `Command { std: "docker" "start" "-a" "bcf996908b228aafffe734e9c80705c96d622f80b307a3e5e7d9d336ce11f2ef", kill_on_drop: false }`
[INFO] [stderr]     Checking rls v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut dirs: Vec<Result<DirEntry, io::Error>> = dirs.collect();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut dirs: Vec<Result<DirEntry, io::Error>> = dirs.collect();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` 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 0.26s
[INFO] running `Command { std: "docker" "inspect" "bcf996908b228aafffe734e9c80705c96d622f80b307a3e5e7d9d336ce11f2ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcf996908b228aafffe734e9c80705c96d622f80b307a3e5e7d9d336ce11f2ef", kill_on_drop: false }`
[INFO] [stdout] bcf996908b228aafffe734e9c80705c96d622f80b307a3e5e7d9d336ce11f2ef