Dec 18 10:48:19.834 INFO checking stderr-0.8.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 10:48:19.834 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/stderr/0.8.0:/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 10:48:20.306 INFO [stdout] 7a3fdf2df9ff17105106ab82c8d96d7800968e13f2819db2ee35ebaad833f223
Dec 18 10:48:20.316 INFO running `"docker" "start" "-a" "7a3fdf2df9ff17105106ab82c8d96d7800968e13f2819db2ee35ebaad833f223"`
Dec 18 10:48:21.732 INFO [stderr]     Checking stderr v0.8.0 (/opt/crater/workdir)
Dec 18 10:48:22.700 INFO [stderr] warning: variable does not need to be mutable
Dec 18 10:48:22.700 INFO [stderr]   --> src/log/mod.rs:40:13
Dec 18 10:48:22.700 INFO [stderr]    |
Dec 18 10:48:22.700 INFO [stderr] 40 |         let mut logger = LOGGER.as_mut();
Dec 18 10:48:22.700 INFO [stderr]    |             ----^^^^^^
Dec 18 10:48:22.700 INFO [stderr]    |             |
Dec 18 10:48:22.700 INFO [stderr]    |             help: remove this `mut`
Dec 18 10:48:22.700 INFO [stderr]    |
Dec 18 10:48:22.700 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 10:48:22.700 INFO [stderr] 
Dec 18 10:48:22.700 INFO [stderr] warning: variable does not need to be mutable
Dec 18 10:48:22.700 INFO [stderr]   --> src/log/mod.rs:40:13
Dec 18 10:48:22.700 INFO [stderr]    |
Dec 18 10:48:22.700 INFO [stderr] 40 |         let mut logger = LOGGER.as_mut();
Dec 18 10:48:22.700 INFO [stderr]    |             ----^^^^^^
Dec 18 10:48:22.700 INFO [stderr]    |             |
Dec 18 10:48:22.700 INFO [stderr]    |             help: remove this `mut`
Dec 18 10:48:22.700 INFO [stderr]    |
Dec 18 10:48:22.700 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 10:48:22.700 INFO [stderr] 
Dec 18 10:48:22.724 INFO [stderr] warning: variable does not need to be mutable
Dec 18 10:48:22.724 INFO [stderr]    --> src/log/mod.rs:137:13
Dec 18 10:48:22.724 INFO [stderr]     |
Dec 18 10:48:22.724 INFO [stderr] 137 |         let mut logger = LOGGER.as_mut();
Dec 18 10:48:22.724 INFO [stderr]     |             ----^^^^^^
Dec 18 10:48:22.724 INFO [stderr]     |             |
Dec 18 10:48:22.724 INFO [stderr]     |             help: remove this `mut`
Dec 18 10:48:22.724 INFO [stderr] 
Dec 18 10:48:22.732 INFO [stderr] warning: variable does not need to be mutable
Dec 18 10:48:22.732 INFO [stderr]    --> src/log/mod.rs:137:13
Dec 18 10:48:22.732 INFO [stderr]     |
Dec 18 10:48:22.732 INFO [stderr] 137 |         let mut logger = LOGGER.as_mut();
Dec 18 10:48:22.732 INFO [stderr]     |             ----^^^^^^
Dec 18 10:48:22.732 INFO [stderr]     |             |
Dec 18 10:48:22.732 INFO [stderr]     |             help: remove this `mut`
Dec 18 10:48:22.732 INFO [stderr] 
Dec 18 10:48:22.772 INFO [stderr] warning: unnecessary `unsafe` block
Dec 18 10:48:22.772 INFO [stderr]   --> src/static_mut.rs:89:9
Dec 18 10:48:22.772 INFO [stderr]    |
Dec 18 10:48:22.772 INFO [stderr] 89 |         unsafe {self.0.into_inner()}
Dec 18 10:48:22.772 INFO [stderr]    |         ^^^^^^ unnecessary `unsafe` block
Dec 18 10:48:22.772 INFO [stderr]    |
Dec 18 10:48:22.772 INFO [stderr]    = note: #[warn(unused_unsafe)] on by default
Dec 18 10:48:22.772 INFO [stderr] 
Dec 18 10:48:22.892 INFO [stderr] warning: unnecessary `unsafe` block
Dec 18 10:48:22.892 INFO [stderr]   --> src/static_mut.rs:89:9
Dec 18 10:48:22.892 INFO [stderr]    |
Dec 18 10:48:22.892 INFO [stderr] 89 |         unsafe {self.0.into_inner()}
Dec 18 10:48:22.892 INFO [stderr]    |         ^^^^^^ unnecessary `unsafe` block
Dec 18 10:48:22.892 INFO [stderr]    |
Dec 18 10:48:22.892 INFO [stderr]    = note: #[warn(unused_unsafe)] on by default
Dec 18 10:48:22.892 INFO [stderr] 
Dec 18 10:48:23.545 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.90s
Dec 18 10:48:24.386 INFO running `"docker" "inspect" "7a3fdf2df9ff17105106ab82c8d96d7800968e13f2819db2ee35ebaad833f223"`
Dec 18 10:48:24.564 INFO running `"docker" "rm" "-f" "7a3fdf2df9ff17105106ab82c8d96d7800968e13f2819db2ee35ebaad833f223"`
Dec 18 10:48:24.738 INFO [stdout] 7a3fdf2df9ff17105106ab82c8d96d7800968e13f2819db2ee35ebaad833f223