Sep 21 08:16:51.407 INFO checking jec-rccow-0.1.0 against try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6 for pr-54394
Sep 21 08:16:51.407 INFO running: cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets
Sep 21 08:16:51.407 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54394/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-4/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 08:16:51.600 INFO blam! af61ecf3249fdff3a1477a87195329034782d4192e1f3e312d8733b14bc7b78f
Sep 21 08:16:51.602 INFO running `"docker" "start" "-a" "af61ecf3249fdff3a1477a87195329034782d4192e1f3e312d8733b14bc7b78f"`
Sep 21 08:16:53.040 INFO kablam! usermod: no changes
Sep 21 08:16:53.109 INFO kablam!     Checking jec-rccow v0.1.0 (/source)
Sep 21 08:16:53.826 INFO kablam! warning: variable does not need to be mutable
Sep 21 08:16:53.826 INFO kablam!   --> src/lib.rs:73:13
Sep 21 08:16:53.826 INFO kablam!    |
Sep 21 08:16:53.826 INFO kablam! 73 |         let mut a = RcCow::new(5i32);
Sep 21 08:16:53.826 INFO kablam!    |             ----^
Sep 21 08:16:53.826 INFO kablam!    |             |
Sep 21 08:16:53.826 INFO kablam!    |             help: remove this `mut`
Sep 21 08:16:53.826 INFO kablam!    |
Sep 21 08:16:53.826 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 21 08:16:53.826 INFO kablam! 
Sep 21 08:16:53.826 INFO kablam! warning: variable does not need to be mutable
Sep 21 08:16:53.826 INFO kablam!   --> src/lib.rs:77:13
Sep 21 08:16:53.826 INFO kablam!    |
Sep 21 08:16:53.826 INFO kablam! 77 |         let mut c = b.clone();
Sep 21 08:16:53.826 INFO kablam!    |             ----^
Sep 21 08:16:53.826 INFO kablam!    |             |
Sep 21 08:16:53.826 INFO kablam!    |             help: remove this `mut`
Sep 21 08:16:53.826 INFO kablam! 
Sep 21 08:16:53.843 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
Sep 21 08:16:53.846 INFO kablam! su: No module specific data is present
Sep 21 08:16:55.133 INFO running `"docker" "rm" "-f" "af61ecf3249fdff3a1477a87195329034782d4192e1f3e312d8733b14bc7b78f"`
Sep 21 08:16:55.246 INFO blam! af61ecf3249fdff3a1477a87195329034782d4192e1f3e312d8733b14bc7b78f