Dec 17 19:10:02.099 INFO checking muktakosh/unicorn against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 19:10:02.099 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 19:10:02.552 INFO [stdout] e4e3e610f61eab19e915eb9b3eff94441d204669865934e80a70a17b2b90d894
Dec 17 19:10:02.555 INFO running `"docker" "start" "-a" "e4e3e610f61eab19e915eb9b3eff94441d204669865934e80a70a17b2b90d894"`
Dec 17 19:10:05.045 INFO [stderr]    Compiling rustc-serialize v0.3.22
Dec 17 19:10:05.046 INFO [stderr]    Compiling unicode-xid v0.0.3
Dec 17 19:10:05.048 INFO [stderr]    Compiling libc v0.2.18
Dec 17 19:10:05.048 INFO [stderr]    Compiling quote v0.3.10
Dec 17 19:10:05.049 INFO [stderr]     Checking serde v0.8.21
Dec 17 19:10:05.131 INFO [stderr]     Checking net2 v0.2.26
Dec 17 19:10:05.132 INFO [stderr]     Checking nix v0.5.1
Dec 17 19:10:05.132 INFO [stderr]     Checking clap v2.19.2
Dec 17 19:10:06.931 INFO [stderr]    Compiling term v0.4.4
Dec 17 19:10:08.197 INFO [stderr]     Checking miow v0.1.5
Dec 17 19:10:10.435 INFO [stderr]    Compiling syn v0.10.5
Dec 17 19:10:23.253 INFO [stderr]     Checking mio v0.5.1
Dec 17 19:10:29.194 INFO [stderr]    Compiling serde_codegen_internals v0.11.3
Dec 17 19:10:29.865 INFO [stderr]     Checking ws v0.5.3
Dec 17 19:10:34.384 INFO [stderr]     Checking serde_json v0.8.4
Dec 17 19:10:36.340 INFO [stderr]    Compiling syntex_pos v0.52.0
Dec 17 19:10:38.452 INFO [stderr]    Compiling syntex_errors v0.52.0
Dec 17 19:10:41.631 INFO [stderr]    Compiling syntex_syntax v0.52.0
Dec 17 19:11:21.804 INFO [stderr]    Compiling syntex v0.52.0
Dec 17 19:11:22.920 INFO [stderr]    Compiling serde_codegen v0.8.21
Dec 17 19:11:25.967 INFO [stderr]    Compiling libunicorn v0.0.1 (/opt/crater/workdir)
Dec 17 19:11:30.248 INFO [stderr] warning: variable does not need to be mutable
Dec 17 19:11:30.248 INFO [stderr]   --> src/router.rs:80:21
Dec 17 19:11:30.248 INFO [stderr]    |
Dec 17 19:11:30.248 INFO [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
Dec 17 19:11:30.248 INFO [stderr]    |                     ----^
Dec 17 19:11:30.248 INFO [stderr]    |                     |
Dec 17 19:11:30.248 INFO [stderr]    |                     help: remove this `mut`
Dec 17 19:11:30.248 INFO [stderr]    |
Dec 17 19:11:30.248 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 19:11:30.248 INFO [stderr] 
Dec 17 19:11:30.396 INFO [stderr] warning: variable does not need to be mutable
Dec 17 19:11:30.396 INFO [stderr]   --> src/router.rs:80:21
Dec 17 19:11:30.396 INFO [stderr]    |
Dec 17 19:11:30.396 INFO [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
Dec 17 19:11:30.396 INFO [stderr]    |                     ----^
Dec 17 19:11:30.396 INFO [stderr]    |                     |
Dec 17 19:11:30.396 INFO [stderr]    |                     help: remove this `mut`
Dec 17 19:11:30.396 INFO [stderr]    |
Dec 17 19:11:30.396 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 19:11:30.396 INFO [stderr] 
Dec 17 19:11:31.496 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 26s
Dec 17 19:11:33.111 INFO running `"docker" "inspect" "e4e3e610f61eab19e915eb9b3eff94441d204669865934e80a70a17b2b90d894"`
Dec 17 19:11:33.444 INFO running `"docker" "rm" "-f" "e4e3e610f61eab19e915eb9b3eff94441d204669865934e80a70a17b2b90d894"`
Dec 17 19:11:33.796 INFO [stdout] e4e3e610f61eab19e915eb9b3eff94441d204669865934e80a70a17b2b90d894