[INFO] fetching crate mono_display 0.1.0...
[INFO] checking mono_display-0.1.0 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate mono_display 0.1.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate mono_display 0.1.0 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mono_display 0.1.0
[INFO] finished tweaking crates.io crate mono_display 0.1.0
[INFO] tweaked toml for crates.io crate mono_display 0.1.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85d67b5b7e3e2bec41d4fdf80b0f969b7e4acbfafd421d2f8c389c4450b71859
[INFO] running `Command { std: "docker" "start" "-a" "85d67b5b7e3e2bec41d4fdf80b0f969b7e4acbfafd421d2f8c389c4450b71859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85d67b5b7e3e2bec41d4fdf80b0f969b7e4acbfafd421d2f8c389c4450b71859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85d67b5b7e3e2bec41d4fdf80b0f969b7e4acbfafd421d2f8c389c4450b71859", kill_on_drop: false }`
[INFO] [stdout] 85d67b5b7e3e2bec41d4fdf80b0f969b7e4acbfafd421d2f8c389c4450b71859
[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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3a69af2a6150c0ece4266fd417dadf39c96e0bd02ea184a393707a272c795cb
[INFO] running `Command { std: "docker" "start" "-a" "c3a69af2a6150c0ece4266fd417dadf39c96e0bd02ea184a393707a272c795cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking rppal v0.7.1
[INFO] [stderr]     Checking bit-set v0.3.0
[INFO] [stderr]     Checking bdf v0.5.5
[INFO] [stderr]    Compiling font-rs v0.1.3
[INFO] [stderr]     Checking mono_display v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ssd1306.rs:188:21
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 let mut end = pos + find_span_end(&old[pos..], &new[pos..]);
[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/ssd1306.rs:188:21
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 let mut end = pos + find_span_end(&old[pos..], &new[pos..]);
[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 2.68s
[INFO] running `Command { std: "docker" "inspect" "c3a69af2a6150c0ece4266fd417dadf39c96e0bd02ea184a393707a272c795cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3a69af2a6150c0ece4266fd417dadf39c96e0bd02ea184a393707a272c795cb", kill_on_drop: false }`
[INFO] [stdout] c3a69af2a6150c0ece4266fd417dadf39c96e0bd02ea184a393707a272c795cb