Sep 17 16:58:13.834 INFO checking specs_engine-0.0.3 against try#cfeeefe83c83bceb55d60d7e2be173db7597ed50 for pr-54033
Sep 17 16:58:13.834 INFO running: cargo +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets
Sep 17 16:58:13.834 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54033/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-6/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/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 +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 16:58:14.275 INFO blam! 03299cc71ea1e61bee024c3485731a8c2aca1058ce85713a2cf696e05238f804
Sep 17 16:58:14.277 INFO running `"docker" "start" "-a" "03299cc71ea1e61bee024c3485731a8c2aca1058ce85713a2cf696e05238f804"`
Sep 17 16:58:15.575 INFO kablam! usermod: no changes
Sep 17 16:58:15.786 INFO kablam!     Checking slog v1.7.1
Sep 17 16:58:15.787 INFO kablam!     Checking pulse v0.5.3
Sep 17 16:58:16.575 INFO kablam!     Checking slog-extra v0.1.2
Sep 17 16:58:16.603 INFO kablam!     Checking specs v0.7.1
Sep 17 16:58:16.899 INFO kablam!     Checking slog-stream v1.2.1
Sep 17 16:58:17.471 INFO kablam!     Checking slog-term v1.5.0
Sep 17 16:58:19.802 INFO kablam!     Checking specs_engine v0.0.3 (/source)
Sep 17 16:58:20.515 INFO kablam! warning: variable does not need to be mutable
Sep 17 16:58:20.515 INFO kablam!   --> src/machine.rs:39:17
Sep 17 16:58:20.515 INFO kablam!    |
Sep 17 16:58:20.515 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 17 16:58:20.515 INFO kablam!    |                 ----^^^^^
Sep 17 16:58:20.515 INFO kablam!    |                 |
Sep 17 16:58:20.515 INFO kablam!    |                 help: remove this `mut`
Sep 17 16:58:20.515 INFO kablam!    |
Sep 17 16:58:20.515 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 17 16:58:20.515 INFO kablam! 
Sep 17 16:58:20.516 INFO kablam! warning: variable does not need to be mutable
Sep 17 16:58:20.516 INFO kablam!   --> src/machine.rs:73:30
Sep 17 16:58:20.516 INFO kablam!    |
Sep 17 16:58:20.516 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 17 16:58:20.516 INFO kablam!    |                              ----^^^^^
Sep 17 16:58:20.516 INFO kablam!    |                              |
Sep 17 16:58:20.516 INFO kablam!    |                              help: remove this `mut`
Sep 17 16:58:20.516 INFO kablam! 
Sep 17 16:58:21.071 INFO kablam! warning: variable does not need to be mutable
Sep 17 16:58:21.071 INFO kablam!   --> src/machine.rs:39:17
Sep 17 16:58:21.071 INFO kablam!    |
Sep 17 16:58:21.071 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 17 16:58:21.071 INFO kablam!    |                 ----^^^^^
Sep 17 16:58:21.071 INFO kablam!    |                 |
Sep 17 16:58:21.071 INFO kablam!    |                 help: remove this `mut`
Sep 17 16:58:21.071 INFO kablam!    |
Sep 17 16:58:21.071 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 17 16:58:21.071 INFO kablam! 
Sep 17 16:58:21.075 INFO kablam! warning: variable does not need to be mutable
Sep 17 16:58:21.075 INFO kablam!   --> src/machine.rs:73:30
Sep 17 16:58:21.075 INFO kablam!    |
Sep 17 16:58:21.075 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 17 16:58:21.075 INFO kablam!    |                              ----^^^^^
Sep 17 16:58:21.075 INFO kablam!    |                              |
Sep 17 16:58:21.075 INFO kablam!    |                              help: remove this `mut`
Sep 17 16:58:21.075 INFO kablam! 
Sep 17 16:58:21.381 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.78s
Sep 17 16:58:21.387 INFO kablam! su: No module specific data is present
Sep 17 16:58:22.108 INFO running `"docker" "rm" "-f" "03299cc71ea1e61bee024c3485731a8c2aca1058ce85713a2cf696e05238f804"`
Sep 17 16:58:22.318 INFO blam! 03299cc71ea1e61bee024c3485731a8c2aca1058ce85713a2cf696e05238f804