Dec 18 13:25:38.287 INFO checking ogg_vorbis_ref-0.0.3 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 13:25:38.287 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/ogg_vorbis_ref/0.0.3:/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 13:25:38.665 INFO [stdout] 3de79b9d16d90248ae1d5120e18eade1045e6e0ced5131dcb530bf122774ac66
Dec 18 13:25:38.670 INFO running `"docker" "start" "-a" "3de79b9d16d90248ae1d5120e18eade1045e6e0ced5131dcb530bf122774ac66"`
Dec 18 13:25:40.076 INFO [stderr]    Compiling ogg-sys v0.0.9
Dec 18 13:25:40.076 INFO [stderr]    Compiling vorbis-sys v0.0.8
Dec 18 13:25:42.234 INFO [stderr]     Checking ogg_vorbis_ref v0.0.3 (/opt/crater/workdir)
Dec 18 13:25:42.636 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:25:42.636 INFO [stderr]   --> src/lib.rs:62:17
Dec 18 13:25:42.636 INFO [stderr]    |
Dec 18 13:25:42.636 INFO [stderr] 62 |             let mut stream = self.stream.as_mut().unwrap();
Dec 18 13:25:42.636 INFO [stderr]    |                 ----^^^^^^
Dec 18 13:25:42.636 INFO [stderr]    |                 |
Dec 18 13:25:42.636 INFO [stderr]    |                 help: remove this `mut`
Dec 18 13:25:42.636 INFO [stderr]    |
Dec 18 13:25:42.636 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 13:25:42.636 INFO [stderr] 
Dec 18 13:25:42.656 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:25:42.656 INFO [stderr]    --> src/lib.rs:177:13
Dec 18 13:25:42.656 INFO [stderr]     |
Dec 18 13:25:42.656 INFO [stderr] 177 |         let mut synth = self.synth.as_mut().unwrap();
Dec 18 13:25:42.656 INFO [stderr]     |             ----^^^^^
Dec 18 13:25:42.656 INFO [stderr]     |             |
Dec 18 13:25:42.656 INFO [stderr]     |             help: remove this `mut`
Dec 18 13:25:42.656 INFO [stderr] 
Dec 18 13:25:42.826 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:25:42.827 INFO [stderr]   --> src/lib.rs:62:17
Dec 18 13:25:42.827 INFO [stderr]    |
Dec 18 13:25:42.827 INFO [stderr] 62 |             let mut stream = self.stream.as_mut().unwrap();
Dec 18 13:25:42.827 INFO [stderr]    |                 ----^^^^^^
Dec 18 13:25:42.827 INFO [stderr]    |                 |
Dec 18 13:25:42.827 INFO [stderr]    |                 help: remove this `mut`
Dec 18 13:25:42.827 INFO [stderr]    |
Dec 18 13:25:42.827 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 13:25:42.827 INFO [stderr] 
Dec 18 13:25:42.837 INFO [stderr] warning: variable does not need to be mutable
Dec 18 13:25:42.837 INFO [stderr]    --> src/lib.rs:177:13
Dec 18 13:25:42.838 INFO [stderr]     |
Dec 18 13:25:42.838 INFO [stderr] 177 |         let mut synth = self.synth.as_mut().unwrap();
Dec 18 13:25:42.838 INFO [stderr]     |             ----^^^^^
Dec 18 13:25:42.838 INFO [stderr]     |             |
Dec 18 13:25:42.838 INFO [stderr]     |             help: remove this `mut`
Dec 18 13:25:42.838 INFO [stderr] 
Dec 18 13:25:42.932 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.88s
Dec 18 13:25:43.712 INFO running `"docker" "inspect" "3de79b9d16d90248ae1d5120e18eade1045e6e0ced5131dcb530bf122774ac66"`
Dec 18 13:25:43.918 INFO running `"docker" "rm" "-f" "3de79b9d16d90248ae1d5120e18eade1045e6e0ced5131dcb530bf122774ac66"`
Dec 18 13:25:44.120 INFO [stdout] 3de79b9d16d90248ae1d5120e18eade1045e6e0ced5131dcb530bf122774ac66