Dec 12 11:12:10.988 INFO checking multimap-0.4.0 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 11:12:10.988 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 11:12:11.470 INFO [stdout] 4eb2af9ccebb0ec04a109e50a0819dbefe7809e45951386972b2633564f75c04
Dec 12 11:12:11.472 INFO running `"docker" "start" "-a" "4eb2af9ccebb0ec04a109e50a0819dbefe7809e45951386972b2633564f75c04"`
Dec 12 11:12:13.104 INFO [stderr] usermod: no changes
Dec 12 11:12:13.167 INFO [stderr]     Checking multimap v0.4.0 (/source)
Dec 12 11:12:13.928 INFO [stderr] warning: variable does not need to be mutable
Dec 12 11:12:13.928 INFO [stderr]    --> src/lib.rs:249:36
Dec 12 11:12:13.928 INFO [stderr]     |
Dec 12 11:12:13.928 INFO [stderr] 249 |         self.inner.get_mut(k).map(|mut v| v.get_mut(0).unwrap())
Dec 12 11:12:13.928 INFO [stderr]     |                                    ----^
Dec 12 11:12:13.928 INFO [stderr]     |                                    |
Dec 12 11:12:13.928 INFO [stderr]     |                                    help: remove this `mut`
Dec 12 11:12:13.928 INFO [stderr]     |
Dec 12 11:12:13.928 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 11:12:13.928 INFO [stderr] 
Dec 12 11:12:13.937 INFO [stderr] warning: variable does not need to be mutable
Dec 12 11:12:13.937 INFO [stderr]    --> src/lib.rs:590:18
Dec 12 11:12:13.937 INFO [stderr]     |
Dec 12 11:12:13.937 INFO [stderr] 590 |     fn into_iter(mut self) -> IterAllMut<'a, K, Vec<V>> {
Dec 12 11:12:13.937 INFO [stderr]     |                  ----^^^^
Dec 12 11:12:13.937 INFO [stderr]     |                  |
Dec 12 11:12:13.937 INFO [stderr]     |                  help: remove this `mut`
Dec 12 11:12:13.937 INFO [stderr] 
Dec 12 11:12:14.382 INFO [stderr] warning: variable does not need to be mutable
Dec 12 11:12:14.382 INFO [stderr]    --> src/lib.rs:249:36
Dec 12 11:12:14.382 INFO [stderr]     |
Dec 12 11:12:14.382 INFO [stderr] 249 |         self.inner.get_mut(k).map(|mut v| v.get_mut(0).unwrap())
Dec 12 11:12:14.382 INFO [stderr]     |                                    ----^
Dec 12 11:12:14.382 INFO [stderr]     |                                    |
Dec 12 11:12:14.382 INFO [stderr]     |                                    help: remove this `mut`
Dec 12 11:12:14.382 INFO [stderr]     |
Dec 12 11:12:14.388 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 11:12:14.388 INFO [stderr] 
Dec 12 11:12:14.392 INFO [stderr] warning: variable does not need to be mutable
Dec 12 11:12:14.392 INFO [stderr]    --> src/lib.rs:590:18
Dec 12 11:12:14.392 INFO [stderr]     |
Dec 12 11:12:14.396 INFO [stderr] 590 |     fn into_iter(mut self) -> IterAllMut<'a, K, Vec<V>> {
Dec 12 11:12:14.396 INFO [stderr]     |                  ----^^^^
Dec 12 11:12:14.396 INFO [stderr]     |                  |
Dec 12 11:12:14.396 INFO [stderr]     |                  help: remove this `mut`
Dec 12 11:12:14.396 INFO [stderr] 
Dec 12 11:12:14.475 INFO [stderr] warning: variable does not need to be mutable
Dec 12 11:12:14.475 INFO [stderr]     --> src/lib.rs:1112:17
Dec 12 11:12:14.475 INFO [stderr]      |
Dec 12 11:12:14.475 INFO [stderr] 1112 |             let mut v = m.entry(1).or_insert(43);
Dec 12 11:12:14.475 INFO [stderr]      |                 ----^
Dec 12 11:12:14.475 INFO [stderr]      |                 |
Dec 12 11:12:14.475 INFO [stderr]      |                 help: remove this `mut`
Dec 12 11:12:14.475 INFO [stderr] 
Dec 12 11:12:14.481 INFO [stderr] warning: variable does not need to be mutable
Dec 12 11:12:14.481 INFO [stderr]     --> src/lib.rs:1128:17
Dec 12 11:12:14.484 INFO [stderr]      |
Dec 12 11:12:14.484 INFO [stderr] 1128 |             let mut v = m.entry(1).or_insert_vec(vec![43]);
Dec 12 11:12:14.484 INFO [stderr]      |                 ----^
Dec 12 11:12:14.484 INFO [stderr]      |                 |
Dec 12 11:12:14.484 INFO [stderr]      |                 help: remove this `mut`
Dec 12 11:12:14.484 INFO [stderr] 
Dec 12 11:12:14.565 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.44s
Dec 12 11:12:14.568 INFO [stderr] su: No module specific data is present
Dec 12 11:12:15.154 INFO running `"docker" "inspect" "4eb2af9ccebb0ec04a109e50a0819dbefe7809e45951386972b2633564f75c04"`
Dec 12 11:12:15.224 INFO running `"docker" "rm" "-f" "4eb2af9ccebb0ec04a109e50a0819dbefe7809e45951386972b2633564f75c04"`
Dec 12 11:12:15.310 INFO [stdout] 4eb2af9ccebb0ec04a109e50a0819dbefe7809e45951386972b2633564f75c04