[INFO] cloning repository https://github.com/Blargstomp404/minigrep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Blargstomp404/minigrep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlargstomp404%2Fminigrep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlargstomp404%2Fminigrep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2c5577e71721150cf50dddf2c17c79882173975b
[INFO] checking Blargstomp404/minigrep against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlargstomp404%2Fminigrep" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Blargstomp404/minigrep on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Blargstomp404/minigrep
[INFO] finished tweaking git repo https://github.com/Blargstomp404/minigrep
[INFO] tweaked toml for git repo https://github.com/Blargstomp404/minigrep written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Blargstomp404/minigrep already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dbea33ad8250b6395af5865f9855c2909af361c76c299470cf03cded67a40cc4
[INFO] running `Command { std: "docker" "start" "-a" "dbea33ad8250b6395af5865f9855c2909af361c76c299470cf03cded67a40cc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbea33ad8250b6395af5865f9855c2909af361c76c299470cf03cded67a40cc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbea33ad8250b6395af5865f9855c2909af361c76c299470cf03cded67a40cc4", kill_on_drop: false }`
[INFO] [stdout] dbea33ad8250b6395af5865f9855c2909af361c76c299470cf03cded67a40cc4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88158a42b7c105e1fe4beefe33d052c2213e1361f9c7da4b3c7fe26931707beb
[INFO] running `Command { std: "docker" "start" "-a" "88158a42b7c105e1fe4beefe33d052c2213e1361f9c7da4b3c7fe26931707beb", kill_on_drop: false }`
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `contents`
[INFO] [stdout]   --> src/lib.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let contents = fs::read_to_string(config.filename)?;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_contents`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `contents`
[INFO] [stdout]   --> src/lib.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let contents = fs::read_to_string(config.filename)?;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_contents`
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "88158a42b7c105e1fe4beefe33d052c2213e1361f9c7da4b3c7fe26931707beb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88158a42b7c105e1fe4beefe33d052c2213e1361f9c7da4b3c7fe26931707beb", kill_on_drop: false }`
[INFO] [stdout] 88158a42b7c105e1fe4beefe33d052c2213e1361f9c7da4b3c7fe26931707beb