Jul 12 10:57:04.704 INFO checking difflib-0.3.1 against master#ae5b629efd79de78e6ba7ef493c32857bd7f9cf9 for pr-52234
Jul 12 10:57:04.704 INFO running: cargo +ae5b629efd79de78e6ba7ef493c32857bd7f9cf9-alt check --frozen --all --all-targets
Jul 12 10:57:04.704 INFO creating container for: cargo +ae5b629efd79de78e6ba7ef493c32857bd7f9cf9-alt check --frozen --all --all-targets
Jul 12 10:57:04.704 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-52234/master#ae5b629efd79de78e6ba7ef493c32857bd7f9cf9:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-52234/worker-5/master#ae5b629efd79de78e6ba7ef493c32857bd7f9cf9:/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 +ae5b629efd79de78e6ba7ef493c32857bd7f9cf9-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Jul 12 10:57:04.970 INFO blam! 3386df125d69558ee361bf0a328f7e1efb9d449788bf29af5b43173cc16e92eb
Jul 12 10:57:04.972 INFO running `"docker" "start" "-a" "3386df125d69558ee361bf0a328f7e1efb9d449788bf29af5b43173cc16e92eb"`
Jul 12 10:57:06.130 INFO kablam!     Checking difflib v0.3.1 (file:///source)
Jul 12 10:57:08.400 INFO kablam! warning: variable does not need to be mutable
Jul 12 10:57:08.400 INFO kablam!    --> src/sequencematcher.rs:339:17
Jul 12 10:57:08.400 INFO kablam!     |
Jul 12 10:57:08.400 INFO kablam! 339 |             let mut opcode = codes.first_mut().unwrap();
Jul 12 10:57:08.400 INFO kablam!     |                 ----^^^^^^
Jul 12 10:57:08.400 INFO kablam!     |                 |
Jul 12 10:57:08.400 INFO kablam!     |                 help: remove this `mut`
Jul 12 10:57:08.400 INFO kablam!     |
Jul 12 10:57:08.400 INFO kablam!     = note: #[warn(unused_mut)] on by default
Jul 12 10:57:08.400 INFO kablam! 
Jul 12 10:57:08.400 INFO kablam! warning: variable does not need to be mutable
Jul 12 10:57:08.400 INFO kablam!    --> src/sequencematcher.rs:344:17
Jul 12 10:57:08.400 INFO kablam!     |
Jul 12 10:57:08.400 INFO kablam! 344 |             let mut opcode = codes.last_mut().unwrap();
Jul 12 10:57:08.400 INFO kablam!     |                 ----^^^^^^
Jul 12 10:57:08.400 INFO kablam!     |                 |
Jul 12 10:57:08.401 INFO kablam!     |                 help: remove this `mut`
Jul 12 10:57:08.401 INFO kablam! 
Jul 12 10:57:08.909 INFO kablam! warning: variable does not need to be mutable
Jul 12 10:57:08.909 INFO kablam!    --> src/sequencematcher.rs:339:17
Jul 12 10:57:08.909 INFO kablam!     |
Jul 12 10:57:08.909 INFO kablam! 339 |             let mut opcode = codes.first_mut().unwrap();
Jul 12 10:57:08.909 INFO kablam!     |                 ----^^^^^^
Jul 12 10:57:08.909 INFO kablam!     |                 |
Jul 12 10:57:08.909 INFO kablam!     |                 help: remove this `mut`
Jul 12 10:57:08.915 INFO kablam!     |
Jul 12 10:57:08.915 INFO kablam!     = note: #[warn(unused_mut)] on by default
Jul 12 10:57:08.916 INFO kablam! 
Jul 12 10:57:08.916 INFO kablam! warning: variable does not need to be mutable
Jul 12 10:57:08.916 INFO kablam!    --> src/sequencematcher.rs:344:17
Jul 12 10:57:08.916 INFO kablam!     |
Jul 12 10:57:08.916 INFO kablam! 344 |             let mut opcode = codes.last_mut().unwrap();
Jul 12 10:57:08.916 INFO kablam!     |                 ----^^^^^^
Jul 12 10:57:08.916 INFO kablam!     |                 |
Jul 12 10:57:08.916 INFO kablam!     |                 help: remove this `mut`
Jul 12 10:57:08.917 INFO kablam! 
Jul 12 10:57:10.073 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 3.98s
Jul 12 10:57:10.081 INFO kablam! su: No module specific data is present
Jul 12 10:57:10.621 INFO running `"docker" "rm" "-f" "3386df125d69558ee361bf0a328f7e1efb9d449788bf29af5b43173cc16e92eb"`
Jul 12 10:57:10.794 INFO blam! 3386df125d69558ee361bf0a328f7e1efb9d449788bf29af5b43173cc16e92eb