Sep 05 23:40:42.368 INFO checking specs_engine-0.0.3 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 05 23:40:42.368 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 05 23:40:42.368 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-2/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 05 23:40:42.607 INFO blam! 053b88a71ff0a2384f5db6c4217d67ba9b9dbb78614f192fecc390fe92966d5f
Sep 05 23:40:42.608 INFO running `"docker" "start" "-a" "053b88a71ff0a2384f5db6c4217d67ba9b9dbb78614f192fecc390fe92966d5f"`
Sep 05 23:40:43.651 INFO kablam! usermod: no changes
Sep 05 23:40:43.778 INFO kablam!     Checking slog v1.7.1
Sep 05 23:40:43.786 INFO kablam!     Checking specs v0.7.1
Sep 05 23:40:44.546 INFO kablam!     Checking slog-extra v0.1.2
Sep 05 23:40:44.993 INFO kablam!     Checking slog-stream v1.2.1
Sep 05 23:40:45.454 INFO kablam!     Checking slog-term v1.5.0
Sep 05 23:40:46.826 INFO kablam!     Checking specs_engine v0.0.3 (file:///source)
Sep 05 23:40:48.082 INFO kablam! warning: variable does not need to be mutable
Sep 05 23:40:48.082 INFO kablam!   --> src/machine.rs:39:17
Sep 05 23:40:48.082 INFO kablam!    |
Sep 05 23:40:48.082 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 05 23:40:48.082 INFO kablam!    |                 ----^^^^^
Sep 05 23:40:48.082 INFO kablam!    |                 |
Sep 05 23:40:48.082 INFO kablam!    |                 help: remove this `mut`
Sep 05 23:40:48.082 INFO kablam!    |
Sep 05 23:40:48.082 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 05 23:40:48.082 INFO kablam! 
Sep 05 23:40:48.082 INFO kablam! warning: variable does not need to be mutable
Sep 05 23:40:48.082 INFO kablam!   --> src/machine.rs:73:30
Sep 05 23:40:48.082 INFO kablam!    |
Sep 05 23:40:48.082 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 05 23:40:48.082 INFO kablam!    |                              ----^^^^^
Sep 05 23:40:48.082 INFO kablam!    |                              |
Sep 05 23:40:48.082 INFO kablam!    |                              help: remove this `mut`
Sep 05 23:40:48.083 INFO kablam! 
Sep 05 23:40:48.094 INFO kablam! warning: variable does not need to be mutable
Sep 05 23:40:48.094 INFO kablam!   --> src/machine.rs:39:17
Sep 05 23:40:48.094 INFO kablam!    |
Sep 05 23:40:48.094 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 05 23:40:48.094 INFO kablam!    |                 ----^^^^^
Sep 05 23:40:48.094 INFO kablam!    |                 |
Sep 05 23:40:48.094 INFO kablam!    |                 help: remove this `mut`
Sep 05 23:40:48.094 INFO kablam!    |
Sep 05 23:40:48.094 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 05 23:40:48.094 INFO kablam! 
Sep 05 23:40:48.094 INFO kablam! warning: variable does not need to be mutable
Sep 05 23:40:48.095 INFO kablam!   --> src/machine.rs:73:30
Sep 05 23:40:48.095 INFO kablam!    |
Sep 05 23:40:48.095 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 05 23:40:48.095 INFO kablam!    |                              ----^^^^^
Sep 05 23:40:48.095 INFO kablam!    |                              |
Sep 05 23:40:48.095 INFO kablam!    |                              help: remove this `mut`
Sep 05 23:40:48.095 INFO kablam! 
Sep 05 23:40:48.778 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.09s
Sep 05 23:40:48.790 INFO kablam! su: No module specific data is present
Sep 05 23:40:49.756 INFO running `"docker" "rm" "-f" "053b88a71ff0a2384f5db6c4217d67ba9b9dbb78614f192fecc390fe92966d5f"`
Sep 05 23:40:49.859 INFO blam! 053b88a71ff0a2384f5db6c4217d67ba9b9dbb78614f192fecc390fe92966d5f