Sep 19 17:53:05.882 INFO checking specs_engine-0.0.3 against master#ff6422d7a392acfc8af28994d65af2bbaecea4f6 for pr-54346
Sep 19 17:53:05.882 INFO running: cargo +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets
Sep 19 17:53:05.882 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54346/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54346/worker-6/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/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 +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 17:53:06.023 INFO blam! b9076a47db1df2d1096ea53316c937d3f2f01dbfc7539d5111bafc4da93b91ca
Sep 19 17:53:06.025 INFO running `"docker" "start" "-a" "b9076a47db1df2d1096ea53316c937d3f2f01dbfc7539d5111bafc4da93b91ca"`
Sep 19 17:53:06.707 INFO kablam! usermod: no changes
Sep 19 17:53:06.797 INFO kablam!     Checking slog v1.7.1
Sep 19 17:53:06.811 INFO kablam!     Checking pulse v0.5.3
Sep 19 17:53:06.812 INFO kablam!     Checking threadpool v1.7.1
Sep 19 17:53:07.653 INFO kablam!     Checking slog-extra v0.1.2
Sep 19 17:53:07.735 INFO kablam!     Checking specs v0.7.1
Sep 19 17:53:08.099 INFO kablam!     Checking slog-stream v1.2.1
Sep 19 17:53:08.543 INFO kablam!     Checking slog-term v1.5.0
Sep 19 17:53:10.651 INFO kablam!     Checking specs_engine v0.0.3 (/source)
Sep 19 17:53:11.351 INFO kablam! warning: variable does not need to be mutable
Sep 19 17:53:11.351 INFO kablam!   --> src/machine.rs:39:17
Sep 19 17:53:11.351 INFO kablam!    |
Sep 19 17:53:11.351 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 19 17:53:11.351 INFO kablam!    |                 ----^^^^^
Sep 19 17:53:11.351 INFO kablam!    |                 |
Sep 19 17:53:11.351 INFO kablam!    |                 help: remove this `mut`
Sep 19 17:53:11.351 INFO kablam!    |
Sep 19 17:53:11.351 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 19 17:53:11.351 INFO kablam! 
Sep 19 17:53:11.351 INFO kablam! warning: variable does not need to be mutable
Sep 19 17:53:11.351 INFO kablam!   --> src/machine.rs:73:30
Sep 19 17:53:11.351 INFO kablam!    |
Sep 19 17:53:11.351 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 19 17:53:11.351 INFO kablam!    |                              ----^^^^^
Sep 19 17:53:11.351 INFO kablam!    |                              |
Sep 19 17:53:11.351 INFO kablam!    |                              help: remove this `mut`
Sep 19 17:53:11.351 INFO kablam! 
Sep 19 17:53:11.403 INFO kablam! warning: variable does not need to be mutable
Sep 19 17:53:11.403 INFO kablam!   --> src/machine.rs:39:17
Sep 19 17:53:11.403 INFO kablam!    |
Sep 19 17:53:11.403 INFO kablam! 39 |             let mut state = self._stack.last_mut().expect("Called long update without a state in the stack!");
Sep 19 17:53:11.403 INFO kablam!    |                 ----^^^^^
Sep 19 17:53:11.403 INFO kablam!    |                 |
Sep 19 17:53:11.403 INFO kablam!    |                 help: remove this `mut`
Sep 19 17:53:11.403 INFO kablam!    |
Sep 19 17:53:11.403 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 19 17:53:11.403 INFO kablam! 
Sep 19 17:53:11.403 INFO kablam! warning: variable does not need to be mutable
Sep 19 17:53:11.403 INFO kablam!   --> src/machine.rs:73:30
Sep 19 17:53:11.403 INFO kablam!    |
Sep 19 17:53:11.403 INFO kablam! 73 |                  if let Some(mut state) = self._stack.last_mut() {
Sep 19 17:53:11.403 INFO kablam!    |                              ----^^^^^
Sep 19 17:53:11.403 INFO kablam!    |                              |
Sep 19 17:53:11.403 INFO kablam!    |                              help: remove this `mut`
Sep 19 17:53:11.403 INFO kablam! 
Sep 19 17:53:11.891 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.17s
Sep 19 17:53:11.896 INFO kablam! su: No module specific data is present
Sep 19 17:53:12.416 INFO running `"docker" "rm" "-f" "b9076a47db1df2d1096ea53316c937d3f2f01dbfc7539d5111bafc4da93b91ca"`
Sep 19 17:53:12.602 INFO blam! b9076a47db1df2d1096ea53316c937d3f2f01dbfc7539d5111bafc4da93b91ca