Sep 10 09:24:42.069 INFO checking specs_engine-0.0.3 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 09:24:42.069 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 09:24:42.069 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-6/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 09:24:42.329 INFO blam! 9770f5de89b04c5162a004cfa9be8d8929a99c42cdb7b82e5e13c4d319e2404f
Sep 10 09:24:42.331 INFO running `"docker" "start" "-a" "9770f5de89b04c5162a004cfa9be8d8929a99c42cdb7b82e5e13c4d319e2404f"`
Sep 10 09:24:43.913 INFO kablam! usermod: no changes
Sep 10 09:24:44.062 INFO kablam!     Checking slog v1.7.1
Sep 10 09:24:44.074 INFO kablam!     Checking pulse v0.5.3
Sep 10 09:24:45.015 INFO kablam!     Checking specs v0.7.1
Sep 10 09:24:45.274 INFO kablam!     Checking slog-extra v0.1.2
Sep 10 09:24:45.827 INFO kablam!     Checking slog-stream v1.2.1
Sep 10 09:24:46.277 INFO kablam!     Checking slog-term v1.5.0
Sep 10 09:24:48.166 INFO kablam!     Checking specs_engine v0.0.3 (file:///source)
Sep 10 09:24:49.211 INFO kablam! warning: variable does not need to be mutable
Sep 10 09:24:49.211 INFO kablam!   --> src/machine.rs:39:17
Sep 10 09:24:49.211 INFO kablam!    |
Sep 10 09:24:49.211 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 10 09:24:49.211 INFO kablam!    |                 ----^^^^^
Sep 10 09:24:49.211 INFO kablam!    |                 |
Sep 10 09:24:49.211 INFO kablam!    |                 help: remove this `mut`
Sep 10 09:24:49.212 INFO kablam!    |
Sep 10 09:24:49.212 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 10 09:24:49.212 INFO kablam! 
Sep 10 09:24:49.215 INFO kablam! warning: variable does not need to be mutable
Sep 10 09:24:49.215 INFO kablam!   --> src/machine.rs:73:30
Sep 10 09:24:49.215 INFO kablam!    |
Sep 10 09:24:49.215 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 10 09:24:49.215 INFO kablam!    |                              ----^^^^^
Sep 10 09:24:49.215 INFO kablam!    |                              |
Sep 10 09:24:49.215 INFO kablam!    |                              help: remove this `mut`
Sep 10 09:24:49.226 INFO kablam! 
Sep 10 09:24:49.502 INFO kablam! warning: variable does not need to be mutable
Sep 10 09:24:49.502 INFO kablam!   --> src/machine.rs:39:17
Sep 10 09:24:49.502 INFO kablam!    |
Sep 10 09:24:49.502 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 10 09:24:49.502 INFO kablam!    |                 ----^^^^^
Sep 10 09:24:49.502 INFO kablam!    |                 |
Sep 10 09:24:49.502 INFO kablam!    |                 help: remove this `mut`
Sep 10 09:24:49.502 INFO kablam!    |
Sep 10 09:24:49.502 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 10 09:24:49.502 INFO kablam! 
Sep 10 09:24:49.506 INFO kablam! warning: variable does not need to be mutable
Sep 10 09:24:49.506 INFO kablam!   --> src/machine.rs:73:30
Sep 10 09:24:49.506 INFO kablam!    |
Sep 10 09:24:49.506 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 10 09:24:49.506 INFO kablam!    |                              ----^^^^^
Sep 10 09:24:49.506 INFO kablam!    |                              |
Sep 10 09:24:49.506 INFO kablam!    |                              help: remove this `mut`
Sep 10 09:24:49.506 INFO kablam! 
Sep 10 09:24:50.083 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 6.13s
Sep 10 09:24:50.089 INFO kablam! su: No module specific data is present
Sep 10 09:24:51.306 INFO running `"docker" "rm" "-f" "9770f5de89b04c5162a004cfa9be8d8929a99c42cdb7b82e5e13c4d319e2404f"`
Sep 10 09:24:51.426 INFO blam! 9770f5de89b04c5162a004cfa9be8d8929a99c42cdb7b82e5e13c4d319e2404f