Dec 18 12:43:19.317 INFO checking puzzle-solver-0.4.1 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 12:43:19.317 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/puzzle-solver/0.4.1:/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 12:43:19.507 INFO [stdout] d9ab757dd8d8bec047dc75d67413b6c793a503268a0ff86aca6bf4d0bbc9ceef
Dec 18 12:43:19.509 INFO running `"docker" "start" "-a" "d9ab757dd8d8bec047dc75d67413b6c793a503268a0ff86aca6bf4d0bbc9ceef"`
Dec 18 12:43:20.389 INFO [stderr]     Checking num-rational v0.1.42
Dec 18 12:43:20.978 INFO [stderr]     Checking puzzle-solver v0.4.1 (/opt/crater/workdir)
Dec 18 12:43:21.640 INFO [stderr] warning: variable does not need to be mutable
Dec 18 12:43:21.640 INFO [stderr]    --> src/puzzle.rs:898:21
Dec 18 12:43:21.640 INFO [stderr]     |
Dec 18 12:43:21.640 INFO [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
Dec 18 12:43:21.640 INFO [stderr]     |                     ----^
Dec 18 12:43:21.640 INFO [stderr]     |                     |
Dec 18 12:43:21.640 INFO [stderr]     |                     help: remove this `mut`
Dec 18 12:43:21.640 INFO [stderr]     |
Dec 18 12:43:21.640 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 12:43:21.640 INFO [stderr] 
Dec 18 12:43:21.640 INFO [stderr] warning: variable does not need to be mutable
Dec 18 12:43:21.640 INFO [stderr]    --> src/puzzle.rs:898:14
Dec 18 12:43:21.640 INFO [stderr]     |
Dec 18 12:43:21.640 INFO [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
Dec 18 12:43:21.640 INFO [stderr]     |              ----^
Dec 18 12:43:21.640 INFO [stderr]     |              |
Dec 18 12:43:21.640 INFO [stderr]     |              help: remove this `mut`
Dec 18 12:43:21.640 INFO [stderr] 
Dec 18 12:43:22.464 INFO [stderr] warning: variable does not need to be mutable
Dec 18 12:43:22.464 INFO [stderr]    --> src/puzzle.rs:898:21
Dec 18 12:43:22.464 INFO [stderr]     |
Dec 18 12:43:22.464 INFO [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
Dec 18 12:43:22.464 INFO [stderr]     |                     ----^
Dec 18 12:43:22.464 INFO [stderr]     |                     |
Dec 18 12:43:22.464 INFO [stderr]     |                     help: remove this `mut`
Dec 18 12:43:22.464 INFO [stderr]     |
Dec 18 12:43:22.464 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 12:43:22.464 INFO [stderr] 
Dec 18 12:43:22.464 INFO [stderr] warning: variable does not need to be mutable
Dec 18 12:43:22.464 INFO [stderr]    --> src/puzzle.rs:898:14
Dec 18 12:43:22.464 INFO [stderr]     |
Dec 18 12:43:22.464 INFO [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
Dec 18 12:43:22.464 INFO [stderr]     |              ----^
Dec 18 12:43:22.464 INFO [stderr]     |              |
Dec 18 12:43:22.464 INFO [stderr]     |              help: remove this `mut`
Dec 18 12:43:22.464 INFO [stderr] 
Dec 18 12:43:24.091 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.72s
Dec 18 12:43:24.370 INFO running `"docker" "inspect" "d9ab757dd8d8bec047dc75d67413b6c793a503268a0ff86aca6bf4d0bbc9ceef"`
Dec 18 12:43:24.496 INFO running `"docker" "rm" "-f" "d9ab757dd8d8bec047dc75d67413b6c793a503268a0ff86aca6bf4d0bbc9ceef"`
Dec 18 12:43:24.588 INFO [stdout] d9ab757dd8d8bec047dc75d67413b6c793a503268a0ff86aca6bf4d0bbc9ceef