[INFO] fetching crate image_buffer 0.2.0...
[INFO] checking image_buffer-0.2.0 against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] extracting crate image_buffer 0.2.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate image_buffer 0.2.0 on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate image_buffer 0.2.0
[INFO] finished tweaking crates.io crate image_buffer 0.2.0
[INFO] tweaked toml for crates.io crate image_buffer 0.2.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] 23a7cc5b28f8e77367ebb0c61d640f4f4e80db4860d93c9c87a8b409ea81e4c3
[INFO] running `"docker" "start" "-a" "23a7cc5b28f8e77367ebb0c61d640f4f4e80db4860d93c9c87a8b409ea81e4c3"`
[INFO] [stderr]     Checking image_buffer v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/buffer.rs:396:14
[INFO] [stderr]     |
[INFO] [stderr] 396 |         for (mut to, from) in buffer.pixels_mut().zip(self.pixels()) {
[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/buffer.rs:452:13
[INFO] [stderr]     |
[INFO] [stderr] 452 |         for mut p in a.pixels_mut() {
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/buffer.rs:396:14
[INFO] [stderr]     |
[INFO] [stderr] 396 |         for (mut to, from) in buffer.pixels_mut().zip(self.pixels()) {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 2.52s
[INFO] running `"docker" "inspect" "23a7cc5b28f8e77367ebb0c61d640f4f4e80db4860d93c9c87a8b409ea81e4c3"`
[INFO] running `"docker" "rm" "-f" "23a7cc5b28f8e77367ebb0c61d640f4f4e80db4860d93c9c87a8b409ea81e4c3"`
[INFO] [stdout] 23a7cc5b28f8e77367ebb0c61d640f4f4e80db4860d93c9c87a8b409ea81e4c3