Dec 18 14:49:11.296 INFO checking jconfig-0.1.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 14:49:11.296 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/jconfig/0.1.0:/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 14:49:11.814 INFO [stdout] 7eb6a9196f9bfd584c7985b07c316a665a9455c448ec81118876358e65609467
Dec 18 14:49:11.816 INFO running `"docker" "start" "-a" "7eb6a9196f9bfd584c7985b07c316a665a9455c448ec81118876358e65609467"`
Dec 18 14:49:13.726 INFO [stderr]     Checking jconfig v0.1.0 (/opt/crater/workdir)
Dec 18 14:49:14.428 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:49:14.428 INFO [stderr]   --> src/item.rs:71:13
Dec 18 14:49:14.428 INFO [stderr]    |
Dec 18 14:49:14.428 INFO [stderr] 71 |         let mut inner = unsafe { &mut *self.inner.get() };
Dec 18 14:49:14.428 INFO [stderr]    |             ----^^^^^
Dec 18 14:49:14.428 INFO [stderr]    |             |
Dec 18 14:49:14.428 INFO [stderr]    |             help: remove this `mut`
Dec 18 14:49:14.428 INFO [stderr]    |
Dec 18 14:49:14.428 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 14:49:14.428 INFO [stderr] 
Dec 18 14:49:14.428 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:49:14.428 INFO [stderr]   --> src/item.rs:93:13
Dec 18 14:49:14.428 INFO [stderr]    |
Dec 18 14:49:14.428 INFO [stderr] 93 |         let mut inner = unsafe { &mut *self.inner.get() };
Dec 18 14:49:14.428 INFO [stderr]    |             ----^^^^^
Dec 18 14:49:14.428 INFO [stderr]    |             |
Dec 18 14:49:14.428 INFO [stderr]    |             help: remove this `mut`
Dec 18 14:49:14.428 INFO [stderr] 
Dec 18 14:49:14.680 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:49:14.680 INFO [stderr]   --> src/item.rs:71:13
Dec 18 14:49:14.680 INFO [stderr]    |
Dec 18 14:49:14.680 INFO [stderr] 71 |         let mut inner = unsafe { &mut *self.inner.get() };
Dec 18 14:49:14.680 INFO [stderr]    |             ----^^^^^
Dec 18 14:49:14.680 INFO [stderr]    |             |
Dec 18 14:49:14.680 INFO [stderr]    |             help: remove this `mut`
Dec 18 14:49:14.680 INFO [stderr]    |
Dec 18 14:49:14.680 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 14:49:14.680 INFO [stderr] 
Dec 18 14:49:14.680 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:49:14.680 INFO [stderr]   --> src/item.rs:93:13
Dec 18 14:49:14.680 INFO [stderr]    |
Dec 18 14:49:14.680 INFO [stderr] 93 |         let mut inner = unsafe { &mut *self.inner.get() };
Dec 18 14:49:14.680 INFO [stderr]    |             ----^^^^^
Dec 18 14:49:14.680 INFO [stderr]    |             |
Dec 18 14:49:14.680 INFO [stderr]    |             help: remove this `mut`
Dec 18 14:49:14.680 INFO [stderr] 
Dec 18 14:49:15.247 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
Dec 18 14:49:16.113 INFO running `"docker" "inspect" "7eb6a9196f9bfd584c7985b07c316a665a9455c448ec81118876358e65609467"`
Dec 18 14:49:16.480 INFO running `"docker" "rm" "-f" "7eb6a9196f9bfd584c7985b07c316a665a9455c448ec81118876358e65609467"`
Dec 18 14:49:16.844 INFO [stdout] 7eb6a9196f9bfd584c7985b07c316a665a9455c448ec81118876358e65609467