Dec 05 13:51:29.286 INFO checking file_diff-1.0.0 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 13:51:29.286 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-3/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 13:51:29.607 INFO [stdout] 6b58e83083911a28cd2472acbdc8b3ae8c83c34ba1941ddb356edecf99092212
Dec 05 13:51:29.608 INFO running `"docker" "start" "-a" "6b58e83083911a28cd2472acbdc8b3ae8c83c34ba1941ddb356edecf99092212"`
Dec 05 13:51:30.690 INFO [stderr] usermod: no changes
Dec 05 13:51:30.733 INFO [stderr]     Checking file_diff v1.0.0 (/source)
Dec 05 13:51:31.255 INFO [stderr] warning: variable does not need to be mutable
Dec 05 13:51:31.255 INFO [stderr]   --> src/lib.rs:49:9
Dec 05 13:51:31.255 INFO [stderr]    |
Dec 05 13:51:31.255 INFO [stderr] 49 |     let mut buff1 : &mut [u8] = &mut [0; 1024];
Dec 05 13:51:31.255 INFO [stderr]    |         ----^^^^^
Dec 05 13:51:31.255 INFO [stderr]    |         |
Dec 05 13:51:31.255 INFO [stderr]    |         help: remove this `mut`
Dec 05 13:51:31.255 INFO [stderr]    |
Dec 05 13:51:31.255 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 13:51:31.255 INFO [stderr] 
Dec 05 13:51:31.255 INFO [stderr] warning: variable does not need to be mutable
Dec 05 13:51:31.255 INFO [stderr]   --> src/lib.rs:50:9
Dec 05 13:51:31.255 INFO [stderr]    |
Dec 05 13:51:31.255 INFO [stderr] 50 |     let mut buff2 : &mut [u8] = &mut [0; 1024];
Dec 05 13:51:31.255 INFO [stderr]    |         ----^^^^^
Dec 05 13:51:31.255 INFO [stderr]    |         |
Dec 05 13:51:31.255 INFO [stderr]    |         help: remove this `mut`
Dec 05 13:51:31.255 INFO [stderr] 
Dec 05 13:51:31.404 INFO [stderr] warning: variable does not need to be mutable
Dec 05 13:51:31.404 INFO [stderr]   --> src/lib.rs:49:9
Dec 05 13:51:31.404 INFO [stderr]    |
Dec 05 13:51:31.404 INFO [stderr] 49 |     let mut buff1 : &mut [u8] = &mut [0; 1024];
Dec 05 13:51:31.404 INFO [stderr]    |         ----^^^^^
Dec 05 13:51:31.404 INFO [stderr]    |         |
Dec 05 13:51:31.404 INFO [stderr]    |         help: remove this `mut`
Dec 05 13:51:31.404 INFO [stderr]    |
Dec 05 13:51:31.404 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 05 13:51:31.404 INFO [stderr] 
Dec 05 13:51:31.404 INFO [stderr] warning: variable does not need to be mutable
Dec 05 13:51:31.404 INFO [stderr]   --> src/lib.rs:50:9
Dec 05 13:51:31.404 INFO [stderr]    |
Dec 05 13:51:31.404 INFO [stderr] 50 |     let mut buff2 : &mut [u8] = &mut [0; 1024];
Dec 05 13:51:31.404 INFO [stderr]    |         ----^^^^^
Dec 05 13:51:31.404 INFO [stderr]    |         |
Dec 05 13:51:31.404 INFO [stderr]    |         help: remove this `mut`
Dec 05 13:51:31.404 INFO [stderr] 
Dec 05 13:51:31.415 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
Dec 05 13:51:31.417 INFO [stderr] su: No module specific data is present
Dec 05 13:51:31.922 INFO running `"docker" "inspect" "6b58e83083911a28cd2472acbdc8b3ae8c83c34ba1941ddb356edecf99092212"`
Dec 05 13:51:31.990 INFO running `"docker" "rm" "-f" "6b58e83083911a28cd2472acbdc8b3ae8c83c34ba1941ddb356edecf99092212"`
Dec 05 13:51:32.081 INFO [stdout] 6b58e83083911a28cd2472acbdc8b3ae8c83c34ba1941ddb356edecf99092212