Sep 01 16:27:31.135 INFO checking jec-rccow-0.1.0 against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53831
Sep 01 16:27:31.135 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 01 16:27:31.135 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53831/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-0/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/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=500" "-e" "CMD=cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 16:27:31.362 INFO blam! f176a536c0568e8bce014742bd53c25e71844031534dbc58a374114e95f458d0
Sep 01 16:27:31.364 INFO running `"docker" "start" "-a" "f176a536c0568e8bce014742bd53c25e71844031534dbc58a374114e95f458d0"`
Sep 01 16:27:31.956 INFO kablam!     Checking jec-rccow v0.1.0 (file:///source)
Sep 01 16:27:32.669 INFO kablam! warning: variable does not need to be mutable
Sep 01 16:27:32.669 INFO kablam!   --> src/lib.rs:73:13
Sep 01 16:27:32.669 INFO kablam!    |
Sep 01 16:27:32.669 INFO kablam! 73 |         let mut a = RcCow::new(5i32);
Sep 01 16:27:32.669 INFO kablam!    |             ----^
Sep 01 16:27:32.669 INFO kablam!    |             |
Sep 01 16:27:32.669 INFO kablam!    |             help: remove this `mut`
Sep 01 16:27:32.669 INFO kablam!    |
Sep 01 16:27:32.669 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 16:27:32.669 INFO kablam! 
Sep 01 16:27:32.669 INFO kablam! warning: variable does not need to be mutable
Sep 01 16:27:32.669 INFO kablam!   --> src/lib.rs:77:13
Sep 01 16:27:32.670 INFO kablam!    |
Sep 01 16:27:32.670 INFO kablam! 77 |         let mut c = b.clone();
Sep 01 16:27:32.670 INFO kablam!    |             ----^
Sep 01 16:27:32.670 INFO kablam!    |             |
Sep 01 16:27:32.670 INFO kablam!    |             help: remove this `mut`
Sep 01 16:27:32.670 INFO kablam! 
Sep 01 16:27:32.685 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
Sep 01 16:27:32.687 INFO kablam! su: No module specific data is present
Sep 01 16:27:33.425 INFO running `"docker" "rm" "-f" "f176a536c0568e8bce014742bd53c25e71844031534dbc58a374114e95f458d0"`
Sep 01 16:27:33.549 INFO blam! f176a536c0568e8bce014742bd53c25e71844031534dbc58a374114e95f458d0