Dec 04 13:37:44.608 INFO checking muktakosh/unicorn against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 13:37:44.609 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 04 13:37:45.042 INFO [stdout] 75db5cfc4c6ef90424e94455130a737b13f4d83bc4dfee841de51bed777dcc2f
Dec 04 13:37:45.047 INFO running `"docker" "start" "-a" "75db5cfc4c6ef90424e94455130a737b13f4d83bc4dfee841de51bed777dcc2f"`
Dec 04 13:37:46.779 INFO [stderr] usermod: no changes
Dec 04 13:37:47.010 INFO [stderr]    Compiling quote v0.3.10
Dec 04 13:37:47.015 INFO [stderr]     Checking serde v0.8.21
Dec 04 13:37:47.015 INFO [stderr]    Compiling syntex_pos v0.52.0
Dec 04 13:37:47.015 INFO [stderr]     Checking unicode-bidi v0.2.4
Dec 04 13:37:47.015 INFO [stderr]     Checking net2 v0.2.26
Dec 04 13:37:47.015 INFO [stderr]     Checking nix v0.5.1
Dec 04 13:37:47.015 INFO [stderr]     Checking clap v2.19.2
Dec 04 13:37:47.015 INFO [stderr]    Compiling term v0.4.4
Dec 04 13:37:49.721 INFO [stderr]     Checking miow v0.1.5
Dec 04 13:37:50.889 INFO [stderr]     Checking idna v0.1.0
Dec 04 13:37:53.672 INFO [stderr]    Compiling syn v0.10.5
Dec 04 13:37:59.768 INFO [stderr]    Compiling syntex_errors v0.52.0
Dec 04 13:38:00.601 INFO [stderr]     Checking url v1.2.4
Dec 04 13:38:05.322 INFO [stderr]     Checking mio v0.5.1
Dec 04 13:38:11.921 INFO [stderr]    Compiling syntex_syntax v0.52.0
Dec 04 13:38:14.345 INFO [stderr]     Checking ws v0.5.3
Dec 04 13:38:16.465 INFO [stderr]     Checking serde_json v0.8.4
Dec 04 13:38:17.080 INFO [stderr]    Compiling serde_codegen_internals v0.11.3
Dec 04 13:38:58.119 INFO [stderr]    Compiling syntex v0.52.0
Dec 04 13:38:59.705 INFO [stderr]    Compiling serde_codegen v0.8.21
Dec 04 13:39:06.257 INFO [stderr]    Compiling libunicorn v0.0.1 (/source)
Dec 04 13:39:12.115 INFO [stderr] warning: variable does not need to be mutable
Dec 04 13:39:12.115 INFO [stderr]   --> src/router.rs:80:21
Dec 04 13:39:12.115 INFO [stderr]    |
Dec 04 13:39:12.115 INFO [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
Dec 04 13:39:12.115 INFO [stderr]    |                     ----^
Dec 04 13:39:12.115 INFO [stderr]    |                     |
Dec 04 13:39:12.115 INFO [stderr]    |                     help: remove this `mut`
Dec 04 13:39:12.115 INFO [stderr]    |
Dec 04 13:39:12.115 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 13:39:12.115 INFO [stderr] 
Dec 04 13:39:12.251 INFO [stderr] warning: variable does not need to be mutable
Dec 04 13:39:12.251 INFO [stderr]   --> src/router.rs:80:21
Dec 04 13:39:12.251 INFO [stderr]    |
Dec 04 13:39:12.251 INFO [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
Dec 04 13:39:12.251 INFO [stderr]    |                     ----^
Dec 04 13:39:12.251 INFO [stderr]    |                     |
Dec 04 13:39:12.251 INFO [stderr]    |                     help: remove this `mut`
Dec 04 13:39:12.251 INFO [stderr]    |
Dec 04 13:39:12.251 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 13:39:12.251 INFO [stderr] 
Dec 04 13:39:14.501 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 27s
Dec 04 13:39:14.523 INFO [stderr] su: No module specific data is present
Dec 04 13:39:15.155 INFO running `"docker" "inspect" "75db5cfc4c6ef90424e94455130a737b13f4d83bc4dfee841de51bed777dcc2f"`
Dec 04 13:39:15.528 INFO running `"docker" "rm" "-f" "75db5cfc4c6ef90424e94455130a737b13f4d83bc4dfee841de51bed777dcc2f"`
Dec 04 13:39:15.799 INFO [stdout] 75db5cfc4c6ef90424e94455130a737b13f4d83bc4dfee841de51bed777dcc2f