Dec 11 21:35:51.330 INFO checking bon-chi/tower_of_hanoi_in_rust against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 21:35:51.330 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa9aa79c3c583aab59ac9134542d60a780c35e2e-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 21:35:51.958 INFO [stdout] 934de50750b919da983a334d5919d805b10b65eafdc16fc29f603d33dd444cac
Dec 11 21:35:51.966 INFO running `"docker" "start" "-a" "934de50750b919da983a334d5919d805b10b65eafdc16fc29f603d33dd444cac"`
Dec 11 21:35:53.352 INFO [stderr] usermod: no changes
Dec 11 21:35:53.408 INFO [stderr]     Checking tower_of_hanoi_in_rust v0.1.0 (/source)
Dec 11 21:35:53.792 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:35:53.792 INFO [stderr]   --> src/main.rs:22:9
Dec 11 21:35:53.792 INFO [stderr]    |
Dec 11 21:35:53.792 INFO [stderr] 22 |     let mut new_stream: &mut Vec<i32> = &mut hanoi_stream(n - 1, h1);
Dec 11 21:35:53.792 INFO [stderr]    |         ----^^^^^^^^^^
Dec 11 21:35:53.792 INFO [stderr]    |         |
Dec 11 21:35:53.792 INFO [stderr]    |         help: remove this `mut`
Dec 11 21:35:53.792 INFO [stderr]    |
Dec 11 21:35:53.792 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 21:35:53.792 INFO [stderr] 
Dec 11 21:35:54.016 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:35:54.016 INFO [stderr]   --> src/main.rs:22:9
Dec 11 21:35:54.016 INFO [stderr]    |
Dec 11 21:35:54.016 INFO [stderr] 22 |     let mut new_stream: &mut Vec<i32> = &mut hanoi_stream(n - 1, h1);
Dec 11 21:35:54.016 INFO [stderr]    |         ----^^^^^^^^^^
Dec 11 21:35:54.016 INFO [stderr]    |         |
Dec 11 21:35:54.016 INFO [stderr]    |         help: remove this `mut`
Dec 11 21:35:54.016 INFO [stderr]    |
Dec 11 21:35:54.016 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 21:35:54.016 INFO [stderr] 
Dec 11 21:35:54.066 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
Dec 11 21:35:54.067 INFO [stderr] su: No module specific data is present
Dec 11 21:35:54.810 INFO running `"docker" "inspect" "934de50750b919da983a334d5919d805b10b65eafdc16fc29f603d33dd444cac"`
Dec 11 21:35:55.244 INFO running `"docker" "rm" "-f" "934de50750b919da983a334d5919d805b10b65eafdc16fc29f603d33dd444cac"`
Dec 11 21:35:55.427 INFO [stdout] 934de50750b919da983a334d5919d805b10b65eafdc16fc29f603d33dd444cac