Sep 10 16:13:22.934 INFO checking jec-rccow-0.1.0 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 16:13:22.934 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 16:13:22.934 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-4/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 16:13:23.142 INFO blam! b5f9f15893cece38ea33640a8e4864af2cc99216b5a6d7a8e9a108f14d7f590f
Sep 10 16:13:23.144 INFO running `"docker" "start" "-a" "b5f9f15893cece38ea33640a8e4864af2cc99216b5a6d7a8e9a108f14d7f590f"`
Sep 10 16:13:24.473 INFO kablam! usermod: no changes
Sep 10 16:13:24.530 INFO kablam!     Checking jec-rccow v0.1.0 (file:///source)
Sep 10 16:13:25.370 INFO kablam! warning: variable does not need to be mutable
Sep 10 16:13:25.370 INFO kablam!   --> src/lib.rs:73:13
Sep 10 16:13:25.370 INFO kablam!    |
Sep 10 16:13:25.370 INFO kablam! 73 |         let mut a = RcCow::new(5i32);
Sep 10 16:13:25.370 INFO kablam!    |             ----^
Sep 10 16:13:25.370 INFO kablam!    |             |
Sep 10 16:13:25.370 INFO kablam!    |             help: remove this `mut`
Sep 10 16:13:25.370 INFO kablam!    |
Sep 10 16:13:25.370 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 10 16:13:25.370 INFO kablam! 
Sep 10 16:13:25.370 INFO kablam! warning: variable does not need to be mutable
Sep 10 16:13:25.370 INFO kablam!   --> src/lib.rs:77:13
Sep 10 16:13:25.370 INFO kablam!    |
Sep 10 16:13:25.370 INFO kablam! 77 |         let mut c = b.clone();
Sep 10 16:13:25.370 INFO kablam!    |             ----^
Sep 10 16:13:25.370 INFO kablam!    |             |
Sep 10 16:13:25.370 INFO kablam!    |             help: remove this `mut`
Sep 10 16:13:25.370 INFO kablam! 
Sep 10 16:13:25.402 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
Sep 10 16:13:25.402 INFO kablam! su: No module specific data is present
Sep 10 16:13:26.498 INFO running `"docker" "rm" "-f" "b5f9f15893cece38ea33640a8e4864af2cc99216b5a6d7a8e9a108f14d7f590f"`
Sep 10 16:13:26.613 INFO blam! b5f9f15893cece38ea33640a8e4864af2cc99216b5a6d7a8e9a108f14d7f590f