[INFO] fetching crate mono_display 0.1.0...
[INFO] checking mono_display-0.1.0 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate mono_display 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate mono_display 0.1.0 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "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-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bit-set v0.3.0
[INFO] [stderr]   Downloaded bdf v0.5.5
[INFO] [stderr]   Downloaded bitflags v0.7.0
[INFO] [stderr]   Downloaded rppal v0.7.1
[INFO] [stderr]   Downloaded sdl2 v0.31.0
[INFO] [stderr]   Downloaded sdl2-sys v0.31.0
[INFO] [stderr]   Downloaded font-rs v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1f1f254f961697941692d7129b200778bf9985566a14a9e12951e614dd04024a
[INFO] running `Command { std: "docker" "start" "-a" "1f1f254f961697941692d7129b200778bf9985566a14a9e12951e614dd04024a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f1f254f961697941692d7129b200778bf9985566a14a9e12951e614dd04024a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f1f254f961697941692d7129b200778bf9985566a14a9e12951e614dd04024a", kill_on_drop: false }`
[INFO] [stdout] 1f1f254f961697941692d7129b200778bf9985566a14a9e12951e614dd04024a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f8334071e9a34ddabaa14d1d35d32cd86f776feff8f8029a91d036fb87eaafc
[INFO] running `Command { std: "docker" "start" "-a" "0f8334071e9a34ddabaa14d1d35d32cd86f776feff8f8029a91d036fb87eaafc", kill_on_drop: false }`
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]    Compiling font-rs v0.1.3
[INFO] [stderr]     Checking rppal v0.7.1
[INFO] [stderr]     Checking bit-set v0.3.0
[INFO] [stderr]     Checking bdf v0.5.5
[INFO] [stderr]     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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.80s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0f8334071e9a34ddabaa14d1d35d32cd86f776feff8f8029a91d036fb87eaafc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f8334071e9a34ddabaa14d1d35d32cd86f776feff8f8029a91d036fb87eaafc", kill_on_drop: false }`
[INFO] [stdout] 0f8334071e9a34ddabaa14d1d35d32cd86f776feff8f8029a91d036fb87eaafc