Dec 19 12:13:37.828 INFO checking muktakosh/unicorn against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:13:37.828 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/muktakosh/unicorn:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:13:38.268 INFO [stdout] 85df9d7ccf2b5559b6d141a1fd7f2b2266e5fa69041204ff2be533d9799bceb3
Dec 19 12:13:38.274 INFO running `"docker" "start" "-a" "85df9d7ccf2b5559b6d141a1fd7f2b2266e5fa69041204ff2be533d9799bceb3"`
Dec 19 12:13:40.684 INFO [stderr]     Checking net2 v0.2.26
Dec 19 12:13:40.684 INFO [stderr]     Checking nix v0.5.1
Dec 19 12:13:40.685 INFO [stderr]     Checking serde_json v0.8.4
Dec 19 12:13:40.706 INFO [stderr]    Compiling serde_codegen_internals v0.11.3
Dec 19 12:13:40.709 INFO [stderr]     Checking clap v2.19.2
Dec 19 12:13:40.712 INFO [stderr]    Compiling syntex_errors v0.52.0
Dec 19 12:13:43.185 INFO [stderr]     Checking miow v0.1.5
Dec 19 12:13:51.727 INFO [stderr]    Compiling syntex_syntax v0.52.0
Dec 19 12:13:54.714 INFO [stderr]     Checking mio v0.5.1
Dec 19 12:13:57.235 INFO [stderr]     Checking ws v0.5.3
Dec 19 12:14:38.838 INFO [stderr]    Compiling syntex v0.52.0
Dec 19 12:14:40.117 INFO [stderr]    Compiling serde_codegen v0.8.21
Dec 19 12:14:45.932 INFO [stderr]    Compiling libunicorn v0.0.1 (/opt/crater/workdir)
Dec 19 12:14:50.178 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:14:50.179 INFO [stderr]   --> src/router.rs:80:21
Dec 19 12:14:50.184 INFO [stderr]    |
Dec 19 12:14:50.184 INFO [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
Dec 19 12:14:50.184 INFO [stderr]    |                     ----^
Dec 19 12:14:50.184 INFO [stderr]    |                     |
Dec 19 12:14:50.184 INFO [stderr]    |                     help: remove this `mut`
Dec 19 12:14:50.184 INFO [stderr]    |
Dec 19 12:14:50.184 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 12:14:50.184 INFO [stderr] 
Dec 19 12:14:50.320 INFO [stderr] warning: variable does not need to be mutable
Dec 19 12:14:50.320 INFO [stderr]   --> src/router.rs:80:21
Dec 19 12:14:50.320 INFO [stderr]    |
Dec 19 12:14:50.320 INFO [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
Dec 19 12:14:50.320 INFO [stderr]    |                     ----^
Dec 19 12:14:50.320 INFO [stderr]    |                     |
Dec 19 12:14:50.320 INFO [stderr]    |                     help: remove this `mut`
Dec 19 12:14:50.320 INFO [stderr]    |
Dec 19 12:14:50.320 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 12:14:50.320 INFO [stderr] 
Dec 19 12:14:51.201 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 10s
Dec 19 12:14:52.062 INFO running `"docker" "inspect" "85df9d7ccf2b5559b6d141a1fd7f2b2266e5fa69041204ff2be533d9799bceb3"`
Dec 19 12:14:52.292 INFO running `"docker" "rm" "-f" "85df9d7ccf2b5559b6d141a1fd7f2b2266e5fa69041204ff2be533d9799bceb3"`
Dec 19 12:14:52.579 INFO [stdout] 85df9d7ccf2b5559b6d141a1fd7f2b2266e5fa69041204ff2be533d9799bceb3