Dec 17 19:10:02.005 INFO checking muktakosh/unicorn against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 19:10:02.005 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 19:10:02.480 INFO [stdout] ff1470860aa63604f95d3cc359899b8a5122e1063e1547c6fffa7e030ca7fc51
Dec 17 19:10:02.482 INFO running `"docker" "start" "-a" "ff1470860aa63604f95d3cc359899b8a5122e1063e1547c6fffa7e030ca7fc51"`
Dec 17 19:10:04.757 INFO [stderr]    Compiling quote v0.3.10
Dec 17 19:10:04.759 INFO [stderr]     Checking serde v0.8.21
Dec 17 19:10:04.760 INFO [stderr]    Compiling syntex_pos v0.52.0
Dec 17 19:10:04.760 INFO [stderr]     Checking net2 v0.2.26
Dec 17 19:10:04.760 INFO [stderr]     Checking clap v2.19.2
Dec 17 19:10:04.760 INFO [stderr]    Compiling term v0.4.4
Dec 17 19:10:07.150 INFO [stderr]     Checking miow v0.1.5
Dec 17 19:10:08.042 INFO [stderr]     Checking mio v0.5.1
Dec 17 19:10:08.090 INFO [stderr]    Compiling syn v0.10.5
Dec 17 19:10:15.048 INFO [stderr]     Checking ws v0.5.3
Dec 17 19:10:15.350 INFO [stderr]    Compiling syntex_errors v0.52.0
Dec 17 19:10:28.549 INFO [stderr]    Compiling syntex_syntax v0.52.0
Dec 17 19:10:29.092 INFO [stderr]    Compiling serde_codegen_internals v0.11.3
Dec 17 19:10:33.280 INFO [stderr]     Checking serde_json v0.8.4
Dec 17 19:11:14.996 INFO [stderr]    Compiling syntex v0.52.0
Dec 17 19:11:16.400 INFO [stderr]    Compiling serde_codegen v0.8.21
Dec 17 19:11:20.764 INFO [stderr]    Compiling libunicorn v0.0.1 (/opt/crater/workdir)
Dec 17 19:11:24.028 INFO [stderr] warning: variable does not need to be mutable
Dec 17 19:11:24.028 INFO [stderr]   --> src/router.rs:80:21
Dec 17 19:11:24.028 INFO [stderr]    |
Dec 17 19:11:24.028 INFO [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
Dec 17 19:11:24.028 INFO [stderr]    |                     ----^
Dec 17 19:11:24.028 INFO [stderr]    |                     |
Dec 17 19:11:24.028 INFO [stderr]    |                     help: remove this `mut`
Dec 17 19:11:24.028 INFO [stderr]    |
Dec 17 19:11:24.028 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 19:11:24.028 INFO [stderr] 
Dec 17 19:11:24.140 INFO [stderr] warning: variable does not need to be mutable
Dec 17 19:11:24.140 INFO [stderr]   --> src/router.rs:80:21
Dec 17 19:11:24.140 INFO [stderr]    |
Dec 17 19:11:24.140 INFO [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
Dec 17 19:11:24.140 INFO [stderr]    |                     ----^
Dec 17 19:11:24.140 INFO [stderr]    |                     |
Dec 17 19:11:24.140 INFO [stderr]    |                     help: remove this `mut`
Dec 17 19:11:24.140 INFO [stderr]    |
Dec 17 19:11:24.140 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 19:11:24.140 INFO [stderr] 
Dec 17 19:11:24.671 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 20s
Dec 17 19:11:25.112 INFO running `"docker" "inspect" "ff1470860aa63604f95d3cc359899b8a5122e1063e1547c6fffa7e030ca7fc51"`
Dec 17 19:11:25.351 INFO running `"docker" "rm" "-f" "ff1470860aa63604f95d3cc359899b8a5122e1063e1547c6fffa7e030ca7fc51"`
Dec 17 19:11:25.572 INFO [stdout] ff1470860aa63604f95d3cc359899b8a5122e1063e1547c6fffa7e030ca7fc51