Dec 18 16:35:21.313 INFO checking fast_io-1.2.2 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 16:35:21.313 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/fast_io/1.2.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 16:35:21.525 INFO [stdout] b54a515bfb6a990b1f55b000afe497d872a97dfac53ebd00807a00717bfdef8b
Dec 18 16:35:21.530 INFO running `"docker" "start" "-a" "b54a515bfb6a990b1f55b000afe497d872a97dfac53ebd00807a00717bfdef8b"`
Dec 18 16:35:22.256 INFO [stderr]     Checking fast_io v1.2.2 (/opt/crater/workdir)
Dec 18 16:35:22.520 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:35:22.520 INFO [stderr]   --> src/copy_io.rs:17:13
Dec 18 16:35:22.520 INFO [stderr]    |
Dec 18 16:35:22.520 INFO [stderr] 17 |         let mut buffer = unsafe {
Dec 18 16:35:22.520 INFO [stderr]    |             ----^^^^^^
Dec 18 16:35:22.520 INFO [stderr]    |             |
Dec 18 16:35:22.520 INFO [stderr]    |             help: remove this `mut`
Dec 18 16:35:22.520 INFO [stderr]    |
Dec 18 16:35:22.520 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 16:35:22.520 INFO [stderr] 
Dec 18 16:35:22.523 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:35:22.523 INFO [stderr]   --> src/copy_io.rs:38:17
Dec 18 16:35:22.523 INFO [stderr]    |
Dec 18 16:35:22.523 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Dec 18 16:35:22.523 INFO [stderr]    |                 ----^^^^^^
Dec 18 16:35:22.523 INFO [stderr]    |                 |
Dec 18 16:35:22.523 INFO [stderr]    |                 help: remove this `mut`
Dec 18 16:35:22.523 INFO [stderr] 
Dec 18 16:35:22.583 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:35:22.583 INFO [stderr]   --> src/copy_io.rs:17:13
Dec 18 16:35:22.583 INFO [stderr]    |
Dec 18 16:35:22.583 INFO [stderr] 17 |         let mut buffer = unsafe {
Dec 18 16:35:22.583 INFO [stderr]    |             ----^^^^^^
Dec 18 16:35:22.583 INFO [stderr]    |             |
Dec 18 16:35:22.583 INFO [stderr]    |             help: remove this `mut`
Dec 18 16:35:22.583 INFO [stderr]    |
Dec 18 16:35:22.583 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 16:35:22.583 INFO [stderr] 
Dec 18 16:35:22.585 INFO [stderr] warning: variable does not need to be mutable
Dec 18 16:35:22.585 INFO [stderr]   --> src/copy_io.rs:38:17
Dec 18 16:35:22.585 INFO [stderr]    |
Dec 18 16:35:22.585 INFO [stderr] 38 |             let mut buffer = slice::from_raw_parts_mut(
Dec 18 16:35:22.585 INFO [stderr]    |                 ----^^^^^^
Dec 18 16:35:22.585 INFO [stderr]    |                 |
Dec 18 16:35:22.585 INFO [stderr]    |                 help: remove this `mut`
Dec 18 16:35:22.585 INFO [stderr] 
Dec 18 16:35:22.621 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
Dec 18 16:35:22.847 INFO running `"docker" "inspect" "b54a515bfb6a990b1f55b000afe497d872a97dfac53ebd00807a00717bfdef8b"`
Dec 18 16:35:22.929 INFO running `"docker" "rm" "-f" "b54a515bfb6a990b1f55b000afe497d872a97dfac53ebd00807a00717bfdef8b"`
Dec 18 16:35:23.030 INFO [stdout] b54a515bfb6a990b1f55b000afe497d872a97dfac53ebd00807a00717bfdef8b