Dec 12 13:24:12.184 INFO checking handoff_counter-0.8.5 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 13:24:12.184 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 13:24:12.464 INFO [stdout] e7d7ec431135cb578054ee95ccf067d5f55308bf363b14e86aa09f4aa3824ea6
Dec 12 13:24:12.468 INFO running `"docker" "start" "-a" "e7d7ec431135cb578054ee95ccf067d5f55308bf363b14e86aa09f4aa3824ea6"`
Dec 12 13:24:13.291 INFO [stderr] usermod: no changes
Dec 12 13:24:13.392 INFO [stderr]     Checking handoff_counter v0.8.5 (/source)
Dec 12 13:24:13.988 INFO [stderr] warning: variable does not need to be mutable
Dec 12 13:24:13.988 INFO [stderr]   --> src/handoff_counter.rs:55:13
Dec 12 13:24:13.988 INFO [stderr]    |
Dec 12 13:24:13.988 INFO [stderr] 55 |         let mut v = self.vals.get_mut(&self.id).unwrap();
Dec 12 13:24:13.988 INFO [stderr]    |             ----^
Dec 12 13:24:13.988 INFO [stderr]    |             |
Dec 12 13:24:13.988 INFO [stderr]    |             help: remove this `mut`
Dec 12 13:24:13.988 INFO [stderr]    |
Dec 12 13:24:13.988 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 13:24:13.988 INFO [stderr] 
Dec 12 13:24:14.404 INFO [stderr] warning: variable does not need to be mutable
Dec 12 13:24:14.404 INFO [stderr]   --> src/handoff_counter.rs:55:13
Dec 12 13:24:14.404 INFO [stderr]    |
Dec 12 13:24:14.404 INFO [stderr] 55 |         let mut v = self.vals.get_mut(&self.id).unwrap();
Dec 12 13:24:14.404 INFO [stderr]    |             ----^
Dec 12 13:24:14.404 INFO [stderr]    |             |
Dec 12 13:24:14.404 INFO [stderr]    |             help: remove this `mut`
Dec 12 13:24:14.404 INFO [stderr]    |
Dec 12 13:24:14.404 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 13:24:14.404 INFO [stderr] 
Dec 12 13:24:15.467 INFO [stderr] warning: type alias is never used: `Env`
Dec 12 13:24:15.467 INFO [stderr]   --> src/bin/simulate.rs:14:1
Dec 12 13:24:15.467 INFO [stderr]    |
Dec 12 13:24:15.467 INFO [stderr] 14 | type Env<'a> = HashMap<&'a str, Cnt<'a>>;
Dec 12 13:24:15.467 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 13:24:15.467 INFO [stderr]    |
Dec 12 13:24:15.467 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 13:24:15.467 INFO [stderr] 
Dec 12 13:24:15.576 INFO [stderr] warning: type alias is never used: `Env`
Dec 12 13:24:15.576 INFO [stderr]   --> src/bin/simulate.rs:14:1
Dec 12 13:24:15.576 INFO [stderr]    |
Dec 12 13:24:15.576 INFO [stderr] 14 | type Env<'a> = HashMap<&'a str, Cnt<'a>>;
Dec 12 13:24:15.576 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 13:24:15.576 INFO [stderr]    |
Dec 12 13:24:15.576 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 13:24:15.576 INFO [stderr] 
Dec 12 13:24:15.596 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.27s
Dec 12 13:24:15.600 INFO [stderr] su: No module specific data is present
Dec 12 13:24:15.982 INFO running `"docker" "inspect" "e7d7ec431135cb578054ee95ccf067d5f55308bf363b14e86aa09f4aa3824ea6"`
Dec 12 13:24:16.114 INFO running `"docker" "rm" "-f" "e7d7ec431135cb578054ee95ccf067d5f55308bf363b14e86aa09f4aa3824ea6"`
Dec 12 13:24:16.216 INFO [stdout] e7d7ec431135cb578054ee95ccf067d5f55308bf363b14e86aa09f4aa3824ea6