[INFO] cloning repository https://github.com/MilanR312/save_on_write
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MilanR312/save_on_write" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMilanR312%2Fsave_on_write", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMilanR312%2Fsave_on_write'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f64ec4240ab1cb27600dac7a23ae2f9e3097bcf8
[INFO] checking MilanR312/save_on_write against try#8384de5d92dd9b1c0b67caa5c1c1b11bf606490f for pr-146300
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMilanR312%2Fsave_on_write" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/MilanR312/save_on_write
[INFO] finished tweaking git repo https://github.com/MilanR312/save_on_write
[INFO] tweaked toml for git repo https://github.com/MilanR312/save_on_write written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MilanR312/save_on_write on toolchain 8384de5d92dd9b1c0b67caa5c1c1b11bf606490f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8384de5d92dd9b1c0b67caa5c1c1b11bf606490f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MilanR312/save_on_write 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" "+8384de5d92dd9b1c0b67caa5c1c1b11bf606490f" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v2.0.51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+8384de5d92dd9b1c0b67caa5c1c1b11bf606490f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c2c3fd1f96fddc16c96a18d36ceee4ccdd4a3e665e45925962e12f288dd43c06
[INFO] running `Command { std: "docker" "start" "-a" "c2c3fd1f96fddc16c96a18d36ceee4ccdd4a3e665e45925962e12f288dd43c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2c3fd1f96fddc16c96a18d36ceee4ccdd4a3e665e45925962e12f288dd43c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2c3fd1f96fddc16c96a18d36ceee4ccdd4a3e665e45925962e12f288dd43c06", kill_on_drop: false }`
[INFO] [stdout] c2c3fd1f96fddc16c96a18d36ceee4ccdd4a3e665e45925962e12f288dd43c06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+8384de5d92dd9b1c0b67caa5c1c1b11bf606490f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0eb86cf1137583f369a307de7a9cb5c34df8b713c99fc050c30379c26a5e15a2
[INFO] running `Command { std: "docker" "start" "-a" "0eb86cf1137583f369a307de7a9cb5c34df8b713c99fc050c30379c26a5e15a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]    Compiling serde_json v1.0.114
[INFO] [stderr]    Compiling syn v2.0.51
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]     Checking save_on_write v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/lib.rs:175:59
[INFO] [stdout]     |
[INFO] [stdout] 175 |         let mut notifier = HashListener::new(a, Box::new(|b| {}));
[INFO] [stdout]     |                                                           ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.80s
[INFO] running `Command { std: "docker" "inspect" "0eb86cf1137583f369a307de7a9cb5c34df8b713c99fc050c30379c26a5e15a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eb86cf1137583f369a307de7a9cb5c34df8b713c99fc050c30379c26a5e15a2", kill_on_drop: false }`
[INFO] [stdout] 0eb86cf1137583f369a307de7a9cb5c34df8b713c99fc050c30379c26a5e15a2