[INFO] crate footile 0.3.1 is already in cache
[INFO] checking footile-0.3.1 against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] extracting crate footile 0.3.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate footile 0.3.1 on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate footile 0.3.1
[INFO] finished tweaking crates.io crate footile 0.3.1
[INFO] tweaked toml for crates.io crate footile 0.3.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7fc0ef50ea5511e86506260d13f9580354b09e243a740f2d841f0ba835c95b2f
[INFO] running `"docker" "start" "-a" "7fc0ef50ea5511e86506260d13f9580354b09e243a740f2d841f0ba835c95b2f"`
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking footile v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rgb8.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |         let mut out = clr.over_alpha(*bot, *m);
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/rgba8.rs:195:13
[INFO] [stderr]     |
[INFO] [stderr] 195 |         let mut out = clr.over_alpha(*bot, *m);
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rgb8.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |         let mut out = clr.over_alpha(*bot, *m);
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/rgba8.rs:195:13
[INFO] [stderr]     |
[INFO] [stderr] 195 |         let mut out = clr.over_alpha(*bot, *m);
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.00s
[INFO] running `"docker" "inspect" "7fc0ef50ea5511e86506260d13f9580354b09e243a740f2d841f0ba835c95b2f"`
[INFO] running `"docker" "rm" "-f" "7fc0ef50ea5511e86506260d13f9580354b09e243a740f2d841f0ba835c95b2f"`
[INFO] [stdout] 7fc0ef50ea5511e86506260d13f9580354b09e243a740f2d841f0ba835c95b2f