Aug 31 23:56:56.613 INFO checking jec-rccow-0.1.0 against master#d0d81b7fc1421859ba0218e8a437af29ae3b0967 for pr-53578
Aug 31 23:56:56.613 INFO running: cargo +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets
Aug 31 23:56:56.613 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53578/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-1/master#d0d81b7fc1421859ba0218e8a437af29ae3b0967:/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 +d0d81b7fc1421859ba0218e8a437af29ae3b0967-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 31 23:56:56.778 INFO blam! f86cc3618620fc7bbd2d5fc78ff647998268ef719f5b0a8946f51218241b325b
Aug 31 23:56:56.779 INFO running `"docker" "start" "-a" "f86cc3618620fc7bbd2d5fc78ff647998268ef719f5b0a8946f51218241b325b"`
Aug 31 23:56:57.363 INFO kablam!     Checking jec-rccow v0.1.0 (file:///source)
Aug 31 23:56:58.000 INFO kablam! warning: variable does not need to be mutable
Aug 31 23:56:58.000 INFO kablam!   --> src/lib.rs:73:13
Aug 31 23:56:58.000 INFO kablam!    |
Aug 31 23:56:58.000 INFO kablam! 73 |         let mut a = RcCow::new(5i32);
Aug 31 23:56:58.000 INFO kablam!    |             ----^
Aug 31 23:56:58.000 INFO kablam!    |             |
Aug 31 23:56:58.000 INFO kablam!    |             help: remove this `mut`
Aug 31 23:56:58.000 INFO kablam!    |
Aug 31 23:56:58.000 INFO kablam!    = note: #[warn(unused_mut)] on by default
Aug 31 23:56:58.000 INFO kablam! 
Aug 31 23:56:58.000 INFO kablam! warning: variable does not need to be mutable
Aug 31 23:56:58.000 INFO kablam!   --> src/lib.rs:77:13
Aug 31 23:56:58.000 INFO kablam!    |
Aug 31 23:56:58.000 INFO kablam! 77 |         let mut c = b.clone();
Aug 31 23:56:58.000 INFO kablam!    |             ----^
Aug 31 23:56:58.000 INFO kablam!    |             |
Aug 31 23:56:58.000 INFO kablam!    |             help: remove this `mut`
Aug 31 23:56:58.000 INFO kablam! 
Aug 31 23:56:58.013 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
Aug 31 23:56:58.015 INFO kablam! su: No module specific data is present
Aug 31 23:56:58.646 INFO running `"docker" "rm" "-f" "f86cc3618620fc7bbd2d5fc78ff647998268ef719f5b0a8946f51218241b325b"`
Aug 31 23:56:58.756 INFO blam! f86cc3618620fc7bbd2d5fc78ff647998268ef719f5b0a8946f51218241b325b