Aug 30 02:49:12.811 INFO checking specs_engine-0.0.3 against master#ede55518431154bc761f7b2438cce9078c162700 for pr-53707
Aug 30 02:49:12.811 INFO running: cargo +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets
Aug 30 02:49:12.811 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53707/master#ede55518431154bc761f7b2438cce9078c162700:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-2/master#ede55518431154bc761f7b2438cce9078c162700:/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 +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 02:49:12.997 INFO blam! 711e54d628906484901e0c1a2aee51cc488e932f4d29c73bdced3a2ed392f47d
Aug 30 02:49:12.999 INFO running `"docker" "start" "-a" "711e54d628906484901e0c1a2aee51cc488e932f4d29c73bdced3a2ed392f47d"`
Aug 30 02:49:13.755 INFO kablam!     Checking slog v1.7.1
Aug 30 02:49:13.757 INFO kablam!     Checking specs v0.7.1
Aug 30 02:49:14.486 INFO kablam!     Checking slog-extra v0.1.2
Aug 30 02:49:14.970 INFO kablam!     Checking slog-stream v1.2.1
Aug 30 02:49:15.446 INFO kablam!     Checking slog-term v1.5.0
Aug 30 02:49:17.088 INFO kablam!     Checking specs_engine v0.0.3 (file:///source)
Aug 30 02:49:18.553 INFO kablam! warning: variable does not need to be mutable
Aug 30 02:49:18.553 INFO kablam!   --> src/machine.rs:39:17
Aug 30 02:49:18.553 INFO kablam!    |
Aug 30 02:49:18.553 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Aug 30 02:49:18.553 INFO kablam!    |                 ----^^^^^
Aug 30 02:49:18.553 INFO kablam!    |                 |
Aug 30 02:49:18.553 INFO kablam!    |                 help: remove this `mut`
Aug 30 02:49:18.553 INFO kablam!    |
Aug 30 02:49:18.553 INFO kablam!    = note: #[warn(unused_mut)] on by default
Aug 30 02:49:18.553 INFO kablam! 
Aug 30 02:49:18.560 INFO kablam! warning: variable does not need to be mutable
Aug 30 02:49:18.560 INFO kablam!   --> src/machine.rs:73:30
Aug 30 02:49:18.560 INFO kablam!    |
Aug 30 02:49:18.561 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Aug 30 02:49:18.561 INFO kablam!    |                              ----^^^^^
Aug 30 02:49:18.561 INFO kablam!    |                              |
Aug 30 02:49:18.561 INFO kablam!    |                              help: remove this `mut`
Aug 30 02:49:18.561 INFO kablam! 
Aug 30 02:49:18.632 INFO kablam! warning: variable does not need to be mutable
Aug 30 02:49:18.632 INFO kablam!   --> src/machine.rs:39:17
Aug 30 02:49:18.632 INFO kablam!    |
Aug 30 02:49:18.632 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Aug 30 02:49:18.632 INFO kablam!    |                 ----^^^^^
Aug 30 02:49:18.632 INFO kablam!    |                 |
Aug 30 02:49:18.632 INFO kablam!    |                 help: remove this `mut`
Aug 30 02:49:18.632 INFO kablam!    |
Aug 30 02:49:18.632 INFO kablam!    = note: #[warn(unused_mut)] on by default
Aug 30 02:49:18.632 INFO kablam! 
Aug 30 02:49:18.638 INFO kablam! warning: variable does not need to be mutable
Aug 30 02:49:18.638 INFO kablam!   --> src/machine.rs:73:30
Aug 30 02:49:18.639 INFO kablam!    |
Aug 30 02:49:18.639 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Aug 30 02:49:18.639 INFO kablam!    |                              ----^^^^^
Aug 30 02:49:18.639 INFO kablam!    |                              |
Aug 30 02:49:18.639 INFO kablam!    |                              help: remove this `mut`
Aug 30 02:49:18.639 INFO kablam! 
Aug 30 02:49:19.436 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.73s
Aug 30 02:49:19.441 INFO kablam! su: No module specific data is present
Aug 30 02:49:20.152 INFO running `"docker" "rm" "-f" "711e54d628906484901e0c1a2aee51cc488e932f4d29c73bdced3a2ed392f47d"`
Aug 30 02:49:20.232 INFO blam! 711e54d628906484901e0c1a2aee51cc488e932f4d29c73bdced3a2ed392f47d