Sep 04 02:30:39.502 INFO checking specs_engine-0.0.3 against try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0 for pr-53893
Sep 04 02:30:39.502 INFO running: cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets
Sep 04 02:30:39.502 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53893/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-3/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/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 +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 02:30:39.658 INFO blam! c9c5830dc76fbac345f53083565bb2a6dc55e7f8cbe826917a6453eebddd6b1b
Sep 04 02:30:39.659 INFO running `"docker" "start" "-a" "c9c5830dc76fbac345f53083565bb2a6dc55e7f8cbe826917a6453eebddd6b1b"`
Sep 04 02:30:40.380 INFO kablam!     Checking slog v1.7.1
Sep 04 02:30:40.381 INFO kablam!     Checking pulse v0.5.3
Sep 04 02:30:41.336 INFO kablam!     Checking specs v0.7.1
Sep 04 02:30:41.394 INFO kablam!     Checking slog-extra v0.1.2
Sep 04 02:30:42.049 INFO kablam!     Checking slog-stream v1.2.1
Sep 04 02:30:42.642 INFO kablam!     Checking slog-term v1.5.0
Sep 04 02:30:45.660 INFO kablam!     Checking specs_engine v0.0.3 (file:///source)
Sep 04 02:30:46.844 INFO kablam! warning: variable does not need to be mutable
Sep 04 02:30:46.844 INFO kablam!   --> src/machine.rs:39:17
Sep 04 02:30:46.844 INFO kablam!    |
Sep 04 02:30:46.844 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 04 02:30:46.844 INFO kablam!    |                 ----^^^^^
Sep 04 02:30:46.844 INFO kablam!    |                 |
Sep 04 02:30:46.844 INFO kablam!    |                 help: remove this `mut`
Sep 04 02:30:46.844 INFO kablam!    |
Sep 04 02:30:46.844 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 04 02:30:46.844 INFO kablam! 
Sep 04 02:30:46.851 INFO kablam! warning: variable does not need to be mutable
Sep 04 02:30:46.851 INFO kablam!   --> src/machine.rs:73:30
Sep 04 02:30:46.851 INFO kablam!    |
Sep 04 02:30:46.851 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 04 02:30:46.851 INFO kablam!    |                              ----^^^^^
Sep 04 02:30:46.851 INFO kablam!    |                              |
Sep 04 02:30:46.851 INFO kablam!    |                              help: remove this `mut`
Sep 04 02:30:46.851 INFO kablam! 
Sep 04 02:30:47.307 INFO kablam! warning: variable does not need to be mutable
Sep 04 02:30:47.307 INFO kablam!   --> src/machine.rs:39:17
Sep 04 02:30:47.307 INFO kablam!    |
Sep 04 02:30:47.307 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 04 02:30:47.307 INFO kablam!    |                 ----^^^^^
Sep 04 02:30:47.307 INFO kablam!    |                 |
Sep 04 02:30:47.307 INFO kablam!    |                 help: remove this `mut`
Sep 04 02:30:47.307 INFO kablam!    |
Sep 04 02:30:47.307 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 04 02:30:47.307 INFO kablam! 
Sep 04 02:30:47.315 INFO kablam! warning: variable does not need to be mutable
Sep 04 02:30:47.315 INFO kablam!   --> src/machine.rs:73:30
Sep 04 02:30:47.315 INFO kablam!    |
Sep 04 02:30:47.315 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 04 02:30:47.315 INFO kablam!    |                              ----^^^^^
Sep 04 02:30:47.315 INFO kablam!    |                              |
Sep 04 02:30:47.315 INFO kablam!    |                              help: remove this `mut`
Sep 04 02:30:47.316 INFO kablam! 
Sep 04 02:30:47.816 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 7.51s
Sep 04 02:30:47.824 INFO kablam! su: No module specific data is present
Sep 04 02:30:48.180 INFO running `"docker" "rm" "-f" "c9c5830dc76fbac345f53083565bb2a6dc55e7f8cbe826917a6453eebddd6b1b"`
Sep 04 02:30:48.272 INFO blam! c9c5830dc76fbac345f53083565bb2a6dc55e7f8cbe826917a6453eebddd6b1b