Dec 12 12:38:31.727 INFO checking jec-rccow-0.1.0 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 12:38:31.727 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 12:38:32.185 INFO [stdout] 95f6c49e512e90e9cf75139310d7a94a098efa11e5592c4c580168465893fa33
Dec 12 12:38:32.190 INFO running `"docker" "start" "-a" "95f6c49e512e90e9cf75139310d7a94a098efa11e5592c4c580168465893fa33"`
Dec 12 12:38:33.204 INFO [stderr] usermod: no changes
Dec 12 12:38:33.300 INFO [stderr]     Checking jec-rccow v0.1.0 (/source)
Dec 12 12:38:34.516 INFO [stderr] warning: variable does not need to be mutable
Dec 12 12:38:34.516 INFO [stderr]   --> src/lib.rs:73:13
Dec 12 12:38:34.516 INFO [stderr]    |
Dec 12 12:38:34.516 INFO [stderr] 73 |         let mut a = RcCow::new(5i32);
Dec 12 12:38:34.516 INFO [stderr]    |             ----^
Dec 12 12:38:34.516 INFO [stderr]    |             |
Dec 12 12:38:34.516 INFO [stderr]    |             help: remove this `mut`
Dec 12 12:38:34.516 INFO [stderr]    |
Dec 12 12:38:34.516 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 12:38:34.516 INFO [stderr] 
Dec 12 12:38:34.516 INFO [stderr] warning: variable does not need to be mutable
Dec 12 12:38:34.516 INFO [stderr]   --> src/lib.rs:77:13
Dec 12 12:38:34.516 INFO [stderr]    |
Dec 12 12:38:34.516 INFO [stderr] 77 |         let mut c = b.clone();
Dec 12 12:38:34.516 INFO [stderr]    |             ----^
Dec 12 12:38:34.516 INFO [stderr]    |             |
Dec 12 12:38:34.516 INFO [stderr]    |             help: remove this `mut`
Dec 12 12:38:34.516 INFO [stderr] 
Dec 12 12:38:34.529 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
Dec 12 12:38:34.584 INFO [stderr] su: No module specific data is present
Dec 12 12:38:34.920 INFO running `"docker" "inspect" "95f6c49e512e90e9cf75139310d7a94a098efa11e5592c4c580168465893fa33"`
Dec 12 12:38:35.248 INFO running `"docker" "rm" "-f" "95f6c49e512e90e9cf75139310d7a94a098efa11e5592c4c580168465893fa33"`
Dec 12 12:38:35.495 INFO [stdout] 95f6c49e512e90e9cf75139310d7a94a098efa11e5592c4c580168465893fa33