Dec 18 13:49:18.084 INFO checking multimap-0.4.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 13:49:18.084 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/multimap/0.4.0:/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 13:49:18.509 INFO [stdout] 9f4d32159e077e49d94b09e0bc384f4004406fbd26de5534df8b6d787dff9314
Dec 18 13:49:18.511 INFO running `"docker" "start" "-a" "9f4d32159e077e49d94b09e0bc384f4004406fbd26de5534df8b6d787dff9314"`
Dec 18 13:49:20.293 INFO [stderr]     Checking multimap v0.4.0 (/opt/crater/workdir)
Dec 18 13:49:20.947 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:49:20.947 INFO [stderr]    --> src/lib.rs:249:36
Dec 18 13:49:20.947 INFO [stderr]     |
Dec 18 13:49:20.947 INFO [stderr] 249 |         self.inner.get_mut(k).map(|mut v| v.get_mut(0).unwrap())
Dec 18 13:49:20.947 INFO [stderr]     |                                    ----^
Dec 18 13:49:20.947 INFO [stderr]     |                                    |
Dec 18 13:49:20.947 INFO [stderr]     |                                    help: remove this `mut`
Dec 18 13:49:20.947 INFO [stderr]     |
Dec 18 13:49:20.947 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 13:49:20.947 INFO [stderr] 
Dec 18 13:49:20.957 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:49:20.957 INFO [stderr]    --> src/lib.rs:590:18
Dec 18 13:49:20.957 INFO [stderr]     |
Dec 18 13:49:20.957 INFO [stderr] 590 |     fn into_iter(mut self) -> IterAllMut<'a, K, Vec<V>> {
Dec 18 13:49:20.957 INFO [stderr]     |                  ----^^^^
Dec 18 13:49:20.957 INFO [stderr]     |                  |
Dec 18 13:49:20.957 INFO [stderr]     |                  help: remove this `mut`
Dec 18 13:49:20.964 INFO [stderr] 
Dec 18 13:49:21.184 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:49:21.184 INFO [stderr]    --> src/lib.rs:249:36
Dec 18 13:49:21.184 INFO [stderr]     |
Dec 18 13:49:21.184 INFO [stderr] 249 |         self.inner.get_mut(k).map(|mut v| v.get_mut(0).unwrap())
Dec 18 13:49:21.184 INFO [stderr]     |                                    ----^
Dec 18 13:49:21.184 INFO [stderr]     |                                    |
Dec 18 13:49:21.184 INFO [stderr]     |                                    help: remove this `mut`
Dec 18 13:49:21.184 INFO [stderr]     |
Dec 18 13:49:21.184 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 13:49:21.184 INFO [stderr] 
Dec 18 13:49:21.200 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:49:21.200 INFO [stderr]    --> src/lib.rs:590:18
Dec 18 13:49:21.200 INFO [stderr]     |
Dec 18 13:49:21.200 INFO [stderr] 590 |     fn into_iter(mut self) -> IterAllMut<'a, K, Vec<V>> {
Dec 18 13:49:21.200 INFO [stderr]     |                  ----^^^^
Dec 18 13:49:21.200 INFO [stderr]     |                  |
Dec 18 13:49:21.200 INFO [stderr]     |                  help: remove this `mut`
Dec 18 13:49:21.200 INFO [stderr] 
Dec 18 13:49:21.278 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:49:21.278 INFO [stderr]     --> src/lib.rs:1112:17
Dec 18 13:49:21.278 INFO [stderr]      |
Dec 18 13:49:21.278 INFO [stderr] 1112 |             let mut v = m.entry(1).or_insert(43);
Dec 18 13:49:21.278 INFO [stderr]      |                 ----^
Dec 18 13:49:21.278 INFO [stderr]      |                 |
Dec 18 13:49:21.278 INFO [stderr]      |                 help: remove this `mut`
Dec 18 13:49:21.278 INFO [stderr] 
Dec 18 13:49:21.288 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:49:21.288 INFO [stderr]     --> src/lib.rs:1128:17
Dec 18 13:49:21.288 INFO [stderr]      |
Dec 18 13:49:21.288 INFO [stderr] 1128 |             let mut v = m.entry(1).or_insert_vec(vec![43]);
Dec 18 13:49:21.288 INFO [stderr]      |                 ----^
Dec 18 13:49:21.288 INFO [stderr]      |                 |
Dec 18 13:49:21.288 INFO [stderr]      |                 help: remove this `mut`
Dec 18 13:49:21.288 INFO [stderr] 
Dec 18 13:49:21.344 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
Dec 18 13:49:22.263 INFO running `"docker" "inspect" "9f4d32159e077e49d94b09e0bc384f4004406fbd26de5534df8b6d787dff9314"`
Dec 18 13:49:22.630 INFO running `"docker" "rm" "-f" "9f4d32159e077e49d94b09e0bc384f4004406fbd26de5534df8b6d787dff9314"`
Dec 18 13:49:22.876 INFO [stdout] 9f4d32159e077e49d94b09e0bc384f4004406fbd26de5534df8b6d787dff9314