Dec 18 08:56:05.751 INFO checking zcfg_flag_parser-0.2.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 08:56:05.751 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/zcfg_flag_parser/0.2.0:/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 08:56:05.976 INFO [stdout] b8982ff75d63bef5c3c54e81faf4e6c0269970fd58e94c22afdd7f30be8fcb9e
Dec 18 08:56:05.977 INFO running `"docker" "start" "-a" "b8982ff75d63bef5c3c54e81faf4e6c0269970fd58e94c22afdd7f30be8fcb9e"`
Dec 18 08:56:06.506 INFO [stderr]     Checking zcfg v0.2.0
Dec 18 08:56:06.841 INFO [stderr]     Checking zcfg_flag_parser v0.2.0 (/opt/crater/workdir)
Dec 18 08:56:07.325 INFO [stderr] warning: variable does not need to be mutable
Dec 18 08:56:07.325 INFO [stderr]   --> src/lib.rs:58:16
Dec 18 08:56:07.325 INFO [stderr]    |
Dec 18 08:56:07.325 INFO [stderr] 58 |     .batching(|mut it| {
Dec 18 08:56:07.325 INFO [stderr]    |                ----^^
Dec 18 08:56:07.325 INFO [stderr]    |                |
Dec 18 08:56:07.325 INFO [stderr]    |                help: remove this `mut`
Dec 18 08:56:07.325 INFO [stderr]    |
Dec 18 08:56:07.325 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 08:56:07.325 INFO [stderr] 
Dec 18 08:56:07.331 INFO [stderr] warning: variable does not need to be mutable
Dec 18 08:56:07.331 INFO [stderr]   --> src/lib.rs:58:16
Dec 18 08:56:07.331 INFO [stderr]    |
Dec 18 08:56:07.331 INFO [stderr] 58 |     .batching(|mut it| {
Dec 18 08:56:07.331 INFO [stderr]    |                ----^^
Dec 18 08:56:07.331 INFO [stderr]    |                |
Dec 18 08:56:07.332 INFO [stderr]    |                help: remove this `mut`
Dec 18 08:56:07.332 INFO [stderr]    |
Dec 18 08:56:07.332 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 08:56:07.332 INFO [stderr] 
Dec 18 08:56:07.363 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
Dec 18 08:56:07.606 INFO running `"docker" "inspect" "b8982ff75d63bef5c3c54e81faf4e6c0269970fd58e94c22afdd7f30be8fcb9e"`
Dec 18 08:56:07.712 INFO running `"docker" "rm" "-f" "b8982ff75d63bef5c3c54e81faf4e6c0269970fd58e94c22afdd7f30be8fcb9e"`
Dec 18 08:56:07.925 INFO [stdout] b8982ff75d63bef5c3c54e81faf4e6c0269970fd58e94c22afdd7f30be8fcb9e