Dec 19 19:41:10.885 INFO checking bon-chi/tower_of_hanoi_in_rust against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:41:10.885 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/bon-chi/tower_of_hanoi_in_rust:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:41:11.418 INFO [stdout] 5f30a066397cd77fda99bf416af94a7dedaa940fa6f3e123def870870baa4094
Dec 19 19:41:11.424 INFO running `"docker" "start" "-a" "5f30a066397cd77fda99bf416af94a7dedaa940fa6f3e123def870870baa4094"`
Dec 19 19:41:13.036 INFO [stderr]     Checking tower_of_hanoi_in_rust v0.1.0 (/opt/crater/workdir)
Dec 19 19:41:13.437 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:41:13.437 INFO [stderr]   --> src/main.rs:22:9
Dec 19 19:41:13.437 INFO [stderr]    |
Dec 19 19:41:13.437 INFO [stderr] 22 |     let mut new_stream: &mut Vec<i32> = &mut hanoi_stream(n - 1, h1);
Dec 19 19:41:13.437 INFO [stderr]    |         ----^^^^^^^^^^
Dec 19 19:41:13.437 INFO [stderr]    |         |
Dec 19 19:41:13.437 INFO [stderr]    |         help: remove this `mut`
Dec 19 19:41:13.437 INFO [stderr]    |
Dec 19 19:41:13.437 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 19:41:13.437 INFO [stderr] 
Dec 19 19:41:13.477 INFO [stderr] warning: variable does not need to be mutable
Dec 19 19:41:13.477 INFO [stderr]   --> src/main.rs:22:9
Dec 19 19:41:13.477 INFO [stderr]    |
Dec 19 19:41:13.477 INFO [stderr] 22 |     let mut new_stream: &mut Vec<i32> = &mut hanoi_stream(n - 1, h1);
Dec 19 19:41:13.477 INFO [stderr]    |         ----^^^^^^^^^^
Dec 19 19:41:13.477 INFO [stderr]    |         |
Dec 19 19:41:13.477 INFO [stderr]    |         help: remove this `mut`
Dec 19 19:41:13.477 INFO [stderr]    |
Dec 19 19:41:13.477 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 19:41:13.478 INFO [stderr] 
Dec 19 19:41:13.536 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
Dec 19 19:41:14.120 INFO running `"docker" "inspect" "5f30a066397cd77fda99bf416af94a7dedaa940fa6f3e123def870870baa4094"`
Dec 19 19:41:14.454 INFO running `"docker" "rm" "-f" "5f30a066397cd77fda99bf416af94a7dedaa940fa6f3e123def870870baa4094"`
Dec 19 19:41:14.821 INFO [stdout] 5f30a066397cd77fda99bf416af94a7dedaa940fa6f3e123def870870baa4094