Dec 18 15:18:37.707 INFO checking handoff_counter-0.8.5 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 15:18:37.708 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/handoff_counter/0.8.5:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 15:18:38.244 INFO [stdout] 67adbc31f8c9c291e8b5092e58ff5e3bdfb49d1bc7e4dbbd8ba6b78ad621003a
Dec 18 15:18:38.246 INFO running `"docker" "start" "-a" "67adbc31f8c9c291e8b5092e58ff5e3bdfb49d1bc7e4dbbd8ba6b78ad621003a"`
Dec 18 15:18:39.630 INFO [stderr]     Checking handoff_counter v0.8.5 (/opt/crater/workdir)
Dec 18 15:18:40.050 INFO [stderr] warning: variable does not need to be mutable
Dec 18 15:18:40.050 INFO [stderr]   --> src/handoff_counter.rs:55:13
Dec 18 15:18:40.050 INFO [stderr]    |
Dec 18 15:18:40.050 INFO [stderr] 55 |         let mut v = self.vals.get_mut(&self.id).unwrap();
Dec 18 15:18:40.050 INFO [stderr]    |             ----^
Dec 18 15:18:40.050 INFO [stderr]    |             |
Dec 18 15:18:40.050 INFO [stderr]    |             help: remove this `mut`
Dec 18 15:18:40.050 INFO [stderr]    |
Dec 18 15:18:40.050 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 15:18:40.050 INFO [stderr] 
Dec 18 15:18:40.063 INFO [stderr] warning: variable does not need to be mutable
Dec 18 15:18:40.063 INFO [stderr]   --> src/handoff_counter.rs:55:13
Dec 18 15:18:40.063 INFO [stderr]    |
Dec 18 15:18:40.063 INFO [stderr] 55 |         let mut v = self.vals.get_mut(&self.id).unwrap();
Dec 18 15:18:40.063 INFO [stderr]    |             ----^
Dec 18 15:18:40.063 INFO [stderr]    |             |
Dec 18 15:18:40.063 INFO [stderr]    |             help: remove this `mut`
Dec 18 15:18:40.063 INFO [stderr]    |
Dec 18 15:18:40.063 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 15:18:40.068 INFO [stderr] 
Dec 18 15:18:40.702 INFO [stderr] warning: type alias is never used: `Env`
Dec 18 15:18:40.702 INFO [stderr]   --> src/bin/simulate.rs:14:1
Dec 18 15:18:40.702 INFO [stderr]    |
Dec 18 15:18:40.702 INFO [stderr] 14 | type Env<'a> = HashMap<&'a str, Cnt<'a>>;
Dec 18 15:18:40.702 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 15:18:40.722 INFO [stderr]    |
Dec 18 15:18:40.722 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 15:18:40.722 INFO [stderr] 
Dec 18 15:18:40.821 INFO [stderr] warning: type alias is never used: `Env`
Dec 18 15:18:40.821 INFO [stderr]   --> src/bin/simulate.rs:14:1
Dec 18 15:18:40.821 INFO [stderr]    |
Dec 18 15:18:40.821 INFO [stderr] 14 | type Env<'a> = HashMap<&'a str, Cnt<'a>>;
Dec 18 15:18:40.822 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 15:18:40.822 INFO [stderr]    |
Dec 18 15:18:40.822 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 15:18:40.822 INFO [stderr] 
Dec 18 15:18:40.867 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
Dec 18 15:18:41.298 INFO running `"docker" "inspect" "67adbc31f8c9c291e8b5092e58ff5e3bdfb49d1bc7e4dbbd8ba6b78ad621003a"`
Dec 18 15:18:41.486 INFO running `"docker" "rm" "-f" "67adbc31f8c9c291e8b5092e58ff5e3bdfb49d1bc7e4dbbd8ba6b78ad621003a"`
Dec 18 15:18:41.569 INFO [stdout] 67adbc31f8c9c291e8b5092e58ff5e3bdfb49d1bc7e4dbbd8ba6b78ad621003a