Dec 05 08:44:48.793 INFO checking puzzle-solver-0.4.1 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 08:44:48.794 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 05 08:44:49.194 INFO [stdout] 9c7ed98d576d92e39a346ea748002cf3899064499c2618d15a553c927ab9e6fd
Dec 05 08:44:49.196 INFO running `"docker" "start" "-a" "9c7ed98d576d92e39a346ea748002cf3899064499c2618d15a553c927ab9e6fd"`
Dec 05 08:44:49.824 INFO [stderr] usermod: no changes
Dec 05 08:44:49.868 INFO [stderr]     Checking num-rational v0.1.42
Dec 05 08:44:50.616 INFO [stderr]     Checking puzzle-solver v0.4.1 (/source)
Dec 05 08:44:51.787 INFO [stderr] warning: variable does not need to be mutable
Dec 05 08:44:51.787 INFO [stderr]    --> src/puzzle.rs:898:21
Dec 05 08:44:51.787 INFO [stderr]     |
Dec 05 08:44:51.787 INFO [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
Dec 05 08:44:51.787 INFO [stderr]     |                     ----^
Dec 05 08:44:51.787 INFO [stderr]     |                     |
Dec 05 08:44:51.787 INFO [stderr]     |                     help: remove this `mut`
Dec 05 08:44:51.787 INFO [stderr]     |
Dec 05 08:44:51.787 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 05 08:44:51.787 INFO [stderr] 
Dec 05 08:44:51.787 INFO [stderr] warning: variable does not need to be mutable
Dec 05 08:44:51.787 INFO [stderr]    --> src/puzzle.rs:898:14
Dec 05 08:44:51.787 INFO [stderr]     |
Dec 05 08:44:51.787 INFO [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
Dec 05 08:44:51.787 INFO [stderr]     |              ----^
Dec 05 08:44:51.787 INFO [stderr]     |              |
Dec 05 08:44:51.787 INFO [stderr]     |              help: remove this `mut`
Dec 05 08:44:51.787 INFO [stderr] 
Dec 05 08:44:51.927 INFO [stderr] warning: variable does not need to be mutable
Dec 05 08:44:51.927 INFO [stderr]    --> src/puzzle.rs:898:21
Dec 05 08:44:51.927 INFO [stderr]     |
Dec 05 08:44:51.927 INFO [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
Dec 05 08:44:51.927 INFO [stderr]     |                     ----^
Dec 05 08:44:51.927 INFO [stderr]     |                     |
Dec 05 08:44:51.927 INFO [stderr]     |                     help: remove this `mut`
Dec 05 08:44:51.939 INFO [stderr]     |
Dec 05 08:44:51.939 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 05 08:44:51.939 INFO [stderr] 
Dec 05 08:44:51.939 INFO [stderr] warning: variable does not need to be mutable
Dec 05 08:44:51.939 INFO [stderr]    --> src/puzzle.rs:898:14
Dec 05 08:44:51.939 INFO [stderr]     |
Dec 05 08:44:51.939 INFO [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
Dec 05 08:44:51.939 INFO [stderr]     |              ----^
Dec 05 08:44:51.939 INFO [stderr]     |              |
Dec 05 08:44:51.939 INFO [stderr]     |              help: remove this `mut`
Dec 05 08:44:51.939 INFO [stderr] 
Dec 05 08:44:58.667 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.82s
Dec 05 08:44:58.671 INFO [stderr] su: No module specific data is present
Dec 05 08:44:59.276 INFO running `"docker" "inspect" "9c7ed98d576d92e39a346ea748002cf3899064499c2618d15a553c927ab9e6fd"`
Dec 05 08:44:59.599 INFO running `"docker" "rm" "-f" "9c7ed98d576d92e39a346ea748002cf3899064499c2618d15a553c927ab9e6fd"`
Dec 05 08:44:59.902 INFO [stdout] 9c7ed98d576d92e39a346ea748002cf3899064499c2618d15a553c927ab9e6fd