Dec 12 12:24:34.870 INFO checking kg-symbol-0.1.8 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 12:24:34.871 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa9aa79c3c583aab59ac9134542d60a780c35e2e-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 12:24:35.171 INFO [stdout] f04eb2df7976b20f00f3c662e58cdd926332e824292c7085fb77729499778646
Dec 12 12:24:35.173 INFO running `"docker" "start" "-a" "f04eb2df7976b20f00f3c662e58cdd926332e824292c7085fb77729499778646"`
Dec 12 12:24:35.688 INFO [stderr] usermod: no changes
Dec 12 12:24:35.766 INFO [stderr]     Checking parking_lot_core v0.3.1
Dec 12 12:24:37.020 INFO [stderr]     Checking parking_lot v0.6.4
Dec 12 12:24:38.643 INFO [stderr]     Checking kg-symbol v0.1.8 (/source)
Dec 12 12:24:41.184 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 12 12:24:41.184 INFO [stderr]   --> src/lib.rs:50:33
Dec 12 12:24:41.184 INFO [stderr]    |
Dec 12 12:24:41.184 INFO [stderr] 50 |         Layout::new::<Header>().extend(Layout::from_size_align_unchecked(len, 1)).unwrap()
Dec 12 12:24:41.184 INFO [stderr]    |                                 ^^^^^^
Dec 12 12:24:41.185 INFO [stderr]    |
Dec 12 12:24:41.185 INFO [stderr]    = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 12 12:24:41.185 INFO [stderr] 
Dec 12 12:24:41.226 INFO [stderr] error: aborting due to previous error
Dec 12 12:24:41.226 INFO [stderr] 
Dec 12 12:24:41.226 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 12 12:24:41.245 INFO [stderr] error: Could not compile `kg-symbol`.
Dec 12 12:24:41.245 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 12 12:24:41.620 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 12 12:24:41.621 INFO [stderr]   --> src/lib.rs:50:33
Dec 12 12:24:41.621 INFO [stderr]    |
Dec 12 12:24:41.621 INFO [stderr] 50 |         Layout::new::<Header>().extend(Layout::from_size_align_unchecked(len, 1)).unwrap()
Dec 12 12:24:41.622 INFO [stderr]    |                                 ^^^^^^
Dec 12 12:24:41.622 INFO [stderr]    |
Dec 12 12:24:41.622 INFO [stderr]    = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 12 12:24:41.622 INFO [stderr] 
Dec 12 12:24:41.679 INFO [stderr] error: aborting due to previous error
Dec 12 12:24:41.680 INFO [stderr] 
Dec 12 12:24:41.680 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 12 12:24:41.700 INFO [stderr] error: Could not compile `kg-symbol`.
Dec 12 12:24:41.701 INFO [stderr] 
Dec 12 12:24:41.701 INFO [stderr] To learn more, run the command again with --verbose.
Dec 12 12:24:41.703 INFO [stderr] su: No module specific data is present
Dec 12 12:24:43.186 INFO running `"docker" "inspect" "f04eb2df7976b20f00f3c662e58cdd926332e824292c7085fb77729499778646"`
Dec 12 12:24:43.554 INFO running `"docker" "rm" "-f" "f04eb2df7976b20f00f3c662e58cdd926332e824292c7085fb77729499778646"`
Dec 12 12:24:43.840 INFO [stdout] f04eb2df7976b20f00f3c662e58cdd926332e824292c7085fb77729499778646