Sep 01 05:54:56.774 INFO checking specs_engine-0.0.3 against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53831
Sep 01 05:54:56.774 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 01 05:54:56.775 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53831/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-3/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 05:54:56.934 INFO blam! 59915fc70af9f235679c3d6afa91357d7645e93f5952ab1c156c0f71ab310df8
Sep 01 05:54:56.936 INFO running `"docker" "start" "-a" "59915fc70af9f235679c3d6afa91357d7645e93f5952ab1c156c0f71ab310df8"`
Sep 01 05:54:57.660 INFO kablam!     Checking slog v1.7.1
Sep 01 05:54:57.662 INFO kablam!     Checking specs v0.7.1
Sep 01 05:54:58.445 INFO kablam!     Checking slog-extra v0.1.2
Sep 01 05:54:59.004 INFO kablam!     Checking slog-stream v1.2.1
Sep 01 05:54:59.509 INFO kablam!     Checking slog-term v1.5.0
Sep 01 05:55:01.507 INFO kablam!     Checking specs_engine v0.0.3 (file:///source)
Sep 01 05:55:02.974 INFO kablam! warning: variable does not need to be mutable
Sep 01 05:55:02.974 INFO kablam!   --> src/machine.rs:39:17
Sep 01 05:55:02.975 INFO kablam!    |
Sep 01 05:55:02.975 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 01 05:55:02.975 INFO kablam!    |                 ----^^^^^
Sep 01 05:55:02.975 INFO kablam!    |                 |
Sep 01 05:55:02.975 INFO kablam!    |                 help: remove this `mut`
Sep 01 05:55:02.975 INFO kablam!    |
Sep 01 05:55:02.975 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 05:55:02.975 INFO kablam! 
Sep 01 05:55:02.982 INFO kablam! warning: variable does not need to be mutable
Sep 01 05:55:02.983 INFO kablam!   --> src/machine.rs:73:30
Sep 01 05:55:02.983 INFO kablam!    |
Sep 01 05:55:02.983 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 01 05:55:02.983 INFO kablam!    |                              ----^^^^^
Sep 01 05:55:02.983 INFO kablam!    |                              |
Sep 01 05:55:02.983 INFO kablam!    |                              help: remove this `mut`
Sep 01 05:55:02.983 INFO kablam! 
Sep 01 05:55:03.139 INFO kablam! warning: variable does not need to be mutable
Sep 01 05:55:03.139 INFO kablam!   --> src/machine.rs:39:17
Sep 01 05:55:03.139 INFO kablam!    |
Sep 01 05:55:03.139 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 01 05:55:03.139 INFO kablam!    |                 ----^^^^^
Sep 01 05:55:03.139 INFO kablam!    |                 |
Sep 01 05:55:03.139 INFO kablam!    |                 help: remove this `mut`
Sep 01 05:55:03.139 INFO kablam!    |
Sep 01 05:55:03.139 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 01 05:55:03.139 INFO kablam! 
Sep 01 05:55:03.146 INFO kablam! warning: variable does not need to be mutable
Sep 01 05:55:03.146 INFO kablam!   --> src/machine.rs:73:30
Sep 01 05:55:03.146 INFO kablam!    |
Sep 01 05:55:03.146 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 01 05:55:03.146 INFO kablam!    |                              ----^^^^^
Sep 01 05:55:03.146 INFO kablam!    |                              |
Sep 01 05:55:03.146 INFO kablam!    |                              help: remove this `mut`
Sep 01 05:55:03.146 INFO kablam! 
Sep 01 05:55:03.953 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 6.36s
Sep 01 05:55:03.961 INFO kablam! su: No module specific data is present
Sep 01 05:55:04.450 INFO running `"docker" "rm" "-f" "59915fc70af9f235679c3d6afa91357d7645e93f5952ab1c156c0f71ab310df8"`
Sep 01 05:55:04.563 INFO blam! 59915fc70af9f235679c3d6afa91357d7645e93f5952ab1c156c0f71ab310df8