Sep 01 16:27:30.963 INFO checking jec-rccow-0.1.0 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 16:27:30.963 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 16:27:30.963 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-3/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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 +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 16:27:31.120 INFO blam! 80270be9ceb03c4e4a9884907cc4126b1f5c8e1f538384137300a18606f6f989
Sep 01 16:27:31.122 INFO running `"docker" "start" "-a" "80270be9ceb03c4e4a9884907cc4126b1f5c8e1f538384137300a18606f6f989"`
Sep 01 16:27:31.820 INFO kablam!     Checking jec-rccow v0.1.0 (file:///source)
Sep 01 16:27:32.447 INFO kablam! warning: variable does not need to be mutable
Sep 01 16:27:32.447 INFO kablam!   --> src/lib.rs:73:13
Sep 01 16:27:32.447 INFO kablam!    |
Sep 01 16:27:32.447 INFO kablam! 73 |         let mut a = RcCow::new(5i32);
Sep 01 16:27:32.448 INFO kablam!    |             ----^
Sep 01 16:27:32.448 INFO kablam!    |             |
Sep 01 16:27:32.448 INFO kablam!    |             help: remove this `mut`
Sep 01 16:27:32.448 INFO kablam!    |
Sep 01 16:27:32.448 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 16:27:32.448 INFO kablam! 
Sep 01 16:27:32.448 INFO kablam! warning: variable does not need to be mutable
Sep 01 16:27:32.448 INFO kablam!   --> src/lib.rs:77:13
Sep 01 16:27:32.448 INFO kablam!    |
Sep 01 16:27:32.448 INFO kablam! 77 |         let mut c = b.clone();
Sep 01 16:27:32.448 INFO kablam!    |             ----^
Sep 01 16:27:32.448 INFO kablam!    |             |
Sep 01 16:27:32.448 INFO kablam!    |             help: remove this `mut`
Sep 01 16:27:32.448 INFO kablam! 
Sep 01 16:27:32.462 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
Sep 01 16:27:32.464 INFO kablam! su: No module specific data is present
Sep 01 16:27:33.293 INFO running `"docker" "rm" "-f" "80270be9ceb03c4e4a9884907cc4126b1f5c8e1f538384137300a18606f6f989"`
Sep 01 16:27:33.373 INFO blam! 80270be9ceb03c4e4a9884907cc4126b1f5c8e1f538384137300a18606f6f989