Sep 17 22:34:38.199 INFO checking jec-rccow-0.1.0 against try#cfeeefe83c83bceb55d60d7e2be173db7597ed50 for pr-54033
Sep 17 22:34:38.199 INFO running: cargo +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets
Sep 17 22:34:38.199 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54033/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-4/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/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 +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 22:34:38.594 INFO blam! 714735e637ee3a58be6a6cb3adb807f2382564c8bc953d8a5296915f96237f38
Sep 17 22:34:38.596 INFO running `"docker" "start" "-a" "714735e637ee3a58be6a6cb3adb807f2382564c8bc953d8a5296915f96237f38"`
Sep 17 22:34:40.598 INFO kablam! usermod: no changes
Sep 17 22:34:40.631 INFO kablam!     Checking jec-rccow v0.1.0 (/source)
Sep 17 22:34:41.380 INFO kablam! warning: variable does not need to be mutable
Sep 17 22:34:41.380 INFO kablam!   --> src/lib.rs:73:13
Sep 17 22:34:41.380 INFO kablam!    |
Sep 17 22:34:41.380 INFO kablam! 73 |         let mut a = RcCow::new(5i32);
Sep 17 22:34:41.380 INFO kablam!    |             ----^
Sep 17 22:34:41.380 INFO kablam!    |             |
Sep 17 22:34:41.380 INFO kablam!    |             help: remove this `mut`
Sep 17 22:34:41.380 INFO kablam!    |
Sep 17 22:34:41.380 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 17 22:34:41.380 INFO kablam! 
Sep 17 22:34:41.380 INFO kablam! warning: variable does not need to be mutable
Sep 17 22:34:41.380 INFO kablam!   --> src/lib.rs:77:13
Sep 17 22:34:41.380 INFO kablam!    |
Sep 17 22:34:41.380 INFO kablam! 77 |         let mut c = b.clone();
Sep 17 22:34:41.380 INFO kablam!    |             ----^
Sep 17 22:34:41.380 INFO kablam!    |             |
Sep 17 22:34:41.380 INFO kablam!    |             help: remove this `mut`
Sep 17 22:34:41.380 INFO kablam! 
Sep 17 22:34:41.397 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
Sep 17 22:34:41.397 INFO kablam! su: No module specific data is present
Sep 17 22:34:42.439 INFO running `"docker" "rm" "-f" "714735e637ee3a58be6a6cb3adb807f2382564c8bc953d8a5296915f96237f38"`
Sep 17 22:34:42.691 INFO blam! 714735e637ee3a58be6a6cb3adb807f2382564c8bc953d8a5296915f96237f38