Dec 18 14:39:38.808 INFO checking kg-symbol-0.1.8 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 14:39:38.808 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/kg-symbol/0.1.8:/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 14:39:38.969 INFO [stdout] 8d89b84e9736ac4a23566e73a916b1f984fd76058f6cb4e7003c1d12ae74505d
Dec 18 14:39:38.970 INFO running `"docker" "start" "-a" "8d89b84e9736ac4a23566e73a916b1f984fd76058f6cb4e7003c1d12ae74505d"`
Dec 18 14:39:39.500 INFO [stderr]     Checking parking_lot_core v0.3.1
Dec 18 14:39:40.080 INFO [stderr]     Checking parking_lot v0.6.4
Dec 18 14:39:40.697 INFO [stderr]     Checking kg-symbol v0.1.8 (/opt/crater/workdir)
Dec 18 14:39:41.436 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 18 14:39:41.436 INFO [stderr]   --> src/lib.rs:50:33
Dec 18 14:39:41.436 INFO [stderr]    |
Dec 18 14:39:41.436 INFO [stderr] 50 |         Layout::new::<Header>().extend(Layout::from_size_align_unchecked(len, 1)).unwrap()
Dec 18 14:39:41.436 INFO [stderr]    |                                 ^^^^^^
Dec 18 14:39:41.436 INFO [stderr]    |
Dec 18 14:39:41.436 INFO [stderr]    = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 18 14:39:41.436 INFO [stderr] 
Dec 18 14:39:41.440 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 18 14:39:41.440 INFO [stderr]   --> src/lib.rs:50:33
Dec 18 14:39:41.440 INFO [stderr]    |
Dec 18 14:39:41.440 INFO [stderr] 50 |         Layout::new::<Header>().extend(Layout::from_size_align_unchecked(len, 1)).unwrap()
Dec 18 14:39:41.440 INFO [stderr]    |                                 ^^^^^^
Dec 18 14:39:41.440 INFO [stderr]    |
Dec 18 14:39:41.440 INFO [stderr]    = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 18 14:39:41.440 INFO [stderr] 
Dec 18 14:39:41.472 INFO [stderr] error: aborting due to previous error
Dec 18 14:39:41.472 INFO [stderr] 
Dec 18 14:39:41.472 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 18 14:39:41.480 INFO [stderr] error: Could not compile `kg-symbol`.
Dec 18 14:39:41.480 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 18 14:39:41.540 INFO [stderr] error: aborting due to previous error
Dec 18 14:39:41.540 INFO [stderr] 
Dec 18 14:39:41.540 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 18 14:39:41.558 INFO [stderr] error: Could not compile `kg-symbol`.
Dec 18 14:39:41.558 INFO [stderr] 
Dec 18 14:39:41.558 INFO [stderr] To learn more, run the command again with --verbose.
Dec 18 14:39:42.217 INFO running `"docker" "inspect" "8d89b84e9736ac4a23566e73a916b1f984fd76058f6cb4e7003c1d12ae74505d"`
Dec 18 14:39:42.656 INFO running `"docker" "rm" "-f" "8d89b84e9736ac4a23566e73a916b1f984fd76058f6cb4e7003c1d12ae74505d"`
Dec 18 14:39:42.991 INFO [stdout] 8d89b84e9736ac4a23566e73a916b1f984fd76058f6cb4e7003c1d12ae74505d