Sep 19 17:53:05.779 INFO checking specs_engine-0.0.3 against try#fcacde07b66fe513e52c41b73aef91bcc121905b for pr-54346
Sep 19 17:53:05.779 INFO running: cargo +fcacde07b66fe513e52c41b73aef91bcc121905b-alt check --frozen --all --all-targets
Sep 19 17:53:05.779 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54346/try#fcacde07b66fe513e52c41b73aef91bcc121905b:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54346/worker-4/try#fcacde07b66fe513e52c41b73aef91bcc121905b:/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 +fcacde07b66fe513e52c41b73aef91bcc121905b-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 17:53:05.944 INFO blam! d9b02e2da3eeeb4b7c776f72ddd698c846bedcc22a9d1a1b73eb8143fce3863e
Sep 19 17:53:05.946 INFO running `"docker" "start" "-a" "d9b02e2da3eeeb4b7c776f72ddd698c846bedcc22a9d1a1b73eb8143fce3863e"`
Sep 19 17:53:06.831 INFO kablam! usermod: no changes
Sep 19 17:53:06.995 INFO kablam!     Checking slog v1.7.1
Sep 19 17:53:06.995 INFO kablam!     Checking specs v0.7.1
Sep 19 17:53:07.763 INFO kablam!     Checking slog-extra v0.1.2
Sep 19 17:53:08.367 INFO kablam!     Checking slog-stream v1.2.1
Sep 19 17:53:08.792 INFO kablam!     Checking slog-term v1.5.0
Sep 19 17:53:10.174 INFO kablam!     Checking specs_engine v0.0.3 (/source)
Sep 19 17:53:10.794 INFO kablam! warning: variable does not need to be mutable
Sep 19 17:53:10.794 INFO kablam!   --> src/machine.rs:39:17
Sep 19 17:53:10.794 INFO kablam!    |
Sep 19 17:53:10.794 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 19 17:53:10.794 INFO kablam!    |                 ----^^^^^
Sep 19 17:53:10.794 INFO kablam!    |                 |
Sep 19 17:53:10.794 INFO kablam!    |                 help: remove this `mut`
Sep 19 17:53:10.794 INFO kablam!    |
Sep 19 17:53:10.794 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 19 17:53:10.794 INFO kablam! 
Sep 19 17:53:10.799 INFO kablam! warning: variable does not need to be mutable
Sep 19 17:53:10.799 INFO kablam!   --> src/machine.rs:73:30
Sep 19 17:53:10.799 INFO kablam!    |
Sep 19 17:53:10.799 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 19 17:53:10.799 INFO kablam!    |                              ----^^^^^
Sep 19 17:53:10.799 INFO kablam!    |                              |
Sep 19 17:53:10.799 INFO kablam!    |                              help: remove this `mut`
Sep 19 17:53:10.799 INFO kablam! 
Sep 19 17:53:10.894 INFO kablam! warning: variable does not need to be mutable
Sep 19 17:53:10.894 INFO kablam!   --> src/machine.rs:39:17
Sep 19 17:53:10.894 INFO kablam!    |
Sep 19 17:53:10.894 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 19 17:53:10.894 INFO kablam!    |                 ----^^^^^
Sep 19 17:53:10.894 INFO kablam!    |                 |
Sep 19 17:53:10.894 INFO kablam!    |                 help: remove this `mut`
Sep 19 17:53:10.894 INFO kablam!    |
Sep 19 17:53:10.894 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 19 17:53:10.894 INFO kablam! 
Sep 19 17:53:10.908 INFO kablam! warning: variable does not need to be mutable
Sep 19 17:53:10.908 INFO kablam!   --> src/machine.rs:73:30
Sep 19 17:53:10.908 INFO kablam!    |
Sep 19 17:53:10.908 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 19 17:53:10.908 INFO kablam!    |                              ----^^^^^
Sep 19 17:53:10.909 INFO kablam!    |                              |
Sep 19 17:53:10.909 INFO kablam!    |                              help: remove this `mut`
Sep 19 17:53:10.909 INFO kablam! 
Sep 19 17:53:11.395 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 4.54s
Sep 19 17:53:11.400 INFO kablam! su: No module specific data is present
Sep 19 17:53:11.875 INFO running `"docker" "rm" "-f" "d9b02e2da3eeeb4b7c776f72ddd698c846bedcc22a9d1a1b73eb8143fce3863e"`
Sep 19 17:53:11.985 INFO blam! d9b02e2da3eeeb4b7c776f72ddd698c846bedcc22a9d1a1b73eb8143fce3863e