Nov 30 20:39:15.432 INFO checking jec-rccow-0.1.0 against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 20:39:15.432 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-0/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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"`
Nov 30 20:39:15.652 INFO [stdout] f126b46dd97ef7f18cb96d9bdcede88207e0734096ee4fc83a30c7a4a7cdc48e
Nov 30 20:39:15.654 INFO running `"docker" "start" "-a" "f126b46dd97ef7f18cb96d9bdcede88207e0734096ee4fc83a30c7a4a7cdc48e"`
Nov 30 20:39:16.508 INFO [stderr] usermod: no changes
Nov 30 20:39:16.538 INFO [stderr]     Checking jec-rccow v0.1.0 (/source)
Nov 30 20:39:17.228 INFO [stderr] warning: variable does not need to be mutable
Nov 30 20:39:17.228 INFO [stderr]   --> src/lib.rs:73:13
Nov 30 20:39:17.228 INFO [stderr]    |
Nov 30 20:39:17.228 INFO [stderr] 73 |         let mut a = RcCow::new(5i32);
Nov 30 20:39:17.228 INFO [stderr]    |             ----^
Nov 30 20:39:17.228 INFO [stderr]    |             |
Nov 30 20:39:17.228 INFO [stderr]    |             help: remove this `mut`
Nov 30 20:39:17.228 INFO [stderr]    |
Nov 30 20:39:17.228 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 30 20:39:17.228 INFO [stderr] 
Nov 30 20:39:17.228 INFO [stderr] warning: variable does not need to be mutable
Nov 30 20:39:17.228 INFO [stderr]   --> src/lib.rs:77:13
Nov 30 20:39:17.228 INFO [stderr]    |
Nov 30 20:39:17.228 INFO [stderr] 77 |         let mut c = b.clone();
Nov 30 20:39:17.228 INFO [stderr]    |             ----^
Nov 30 20:39:17.228 INFO [stderr]    |             |
Nov 30 20:39:17.228 INFO [stderr]    |             help: remove this `mut`
Nov 30 20:39:17.228 INFO [stderr] 
Nov 30 20:39:17.247 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
Nov 30 20:39:17.247 INFO [stderr] su: No module specific data is present
Nov 30 20:39:17.770 INFO running `"docker" "inspect" "f126b46dd97ef7f18cb96d9bdcede88207e0734096ee4fc83a30c7a4a7cdc48e"`
Nov 30 20:39:18.034 INFO running `"docker" "rm" "-f" "f126b46dd97ef7f18cb96d9bdcede88207e0734096ee4fc83a30c7a4a7cdc48e"`
Nov 30 20:39:18.360 INFO [stdout] f126b46dd97ef7f18cb96d9bdcede88207e0734096ee4fc83a30c7a4a7cdc48e