Dec 12 15:04:57.170 INFO checking file_diff-1.0.0 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 15:04:57.170 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 12 15:04:57.582 INFO [stdout] 11e4be19eb4444b29179f65a5c8f8c04dad8000949cc63f66470fc5082e24de0
Dec 12 15:04:57.588 INFO running `"docker" "start" "-a" "11e4be19eb4444b29179f65a5c8f8c04dad8000949cc63f66470fc5082e24de0"`
Dec 12 15:04:58.332 INFO [stderr] usermod: no changes
Dec 12 15:04:58.364 INFO [stderr]     Checking file_diff v1.0.0 (/source)
Dec 12 15:04:59.035 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:04:59.036 INFO [stderr]   --> src/lib.rs:49:9
Dec 12 15:04:59.036 INFO [stderr]    |
Dec 12 15:04:59.036 INFO [stderr] 49 |     let mut buff1 : &mut [u8] = &mut [0; 1024];
Dec 12 15:04:59.036 INFO [stderr]    |         ----^^^^^
Dec 12 15:04:59.036 INFO [stderr]    |         |
Dec 12 15:04:59.036 INFO [stderr]    |         help: remove this `mut`
Dec 12 15:04:59.036 INFO [stderr]    |
Dec 12 15:04:59.036 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 15:04:59.036 INFO [stderr] 
Dec 12 15:04:59.036 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:04:59.036 INFO [stderr]   --> src/lib.rs:50:9
Dec 12 15:04:59.036 INFO [stderr]    |
Dec 12 15:04:59.036 INFO [stderr] 50 |     let mut buff2 : &mut [u8] = &mut [0; 1024];
Dec 12 15:04:59.036 INFO [stderr]    |         ----^^^^^
Dec 12 15:04:59.036 INFO [stderr]    |         |
Dec 12 15:04:59.036 INFO [stderr]    |         help: remove this `mut`
Dec 12 15:04:59.036 INFO [stderr] 
Dec 12 15:04:59.103 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:04:59.103 INFO [stderr]   --> src/lib.rs:49:9
Dec 12 15:04:59.103 INFO [stderr]    |
Dec 12 15:04:59.103 INFO [stderr] 49 |     let mut buff1 : &mut [u8] = &mut [0; 1024];
Dec 12 15:04:59.103 INFO [stderr]    |         ----^^^^^
Dec 12 15:04:59.103 INFO [stderr]    |         |
Dec 12 15:04:59.103 INFO [stderr]    |         help: remove this `mut`
Dec 12 15:04:59.103 INFO [stderr]    |
Dec 12 15:04:59.103 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 15:04:59.103 INFO [stderr] 
Dec 12 15:04:59.103 INFO [stderr] warning: variable does not need to be mutable
Dec 12 15:04:59.103 INFO [stderr]   --> src/lib.rs:50:9
Dec 12 15:04:59.103 INFO [stderr]    |
Dec 12 15:04:59.103 INFO [stderr] 50 |     let mut buff2 : &mut [u8] = &mut [0; 1024];
Dec 12 15:04:59.103 INFO [stderr]    |         ----^^^^^
Dec 12 15:04:59.103 INFO [stderr]    |         |
Dec 12 15:04:59.103 INFO [stderr]    |         help: remove this `mut`
Dec 12 15:04:59.103 INFO [stderr] 
Dec 12 15:04:59.118 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
Dec 12 15:04:59.119 INFO [stderr] su: No module specific data is present
Dec 12 15:04:59.353 INFO running `"docker" "inspect" "11e4be19eb4444b29179f65a5c8f8c04dad8000949cc63f66470fc5082e24de0"`
Dec 12 15:04:59.424 INFO running `"docker" "rm" "-f" "11e4be19eb4444b29179f65a5c8f8c04dad8000949cc63f66470fc5082e24de0"`
Dec 12 15:04:59.596 INFO [stdout] 11e4be19eb4444b29179f65a5c8f8c04dad8000949cc63f66470fc5082e24de0