Dec 05 11:20:07.070 INFO checking kg-tree-0.1.1 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 11:20:07.070 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 05 11:20:07.471 INFO [stdout] 8c3bec7915f1c93660c0c10f0f93b0595170e3cf29fad7ec4d703c79fa38e634
Dec 05 11:20:07.479 INFO running `"docker" "start" "-a" "8c3bec7915f1c93660c0c10f0f93b0595170e3cf29fad7ec4d703c79fa38e634"`
Dec 05 11:20:08.102 INFO [stderr] usermod: no changes
Dec 05 11:20:08.319 INFO [stderr]    Compiling heapsize v0.4.2
Dec 05 11:20:08.319 INFO [stderr]     Checking kg-utils v0.2.3
Dec 05 11:20:08.319 INFO [stderr]    Compiling synstructure v0.5.2
Dec 05 11:20:08.319 INFO [stderr]    Compiling syn v0.15.22
Dec 05 11:20:08.319 INFO [stderr]    Compiling kg-display v0.1.1
Dec 05 11:20:08.319 INFO [stderr]     Checking parking_lot_core v0.3.1
Dec 05 11:20:11.579 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 05 11:20:11.579 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-utils-0.2.3/src/collections/sparse_set.rs:231:11
Dec 05 11:20:11.579 INFO [stderr]     |
Dec 05 11:20:11.579 INFO [stderr] 231 |     match Layout::array::<T>(size) {
Dec 05 11:20:11.579 INFO [stderr]     |           ^^^^^^^^^^^^^^^^^^
Dec 05 11:20:11.579 INFO [stderr]     |
Dec 05 11:20:11.579 INFO [stderr]     = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 05 11:20:11.579 INFO [stderr] 
Dec 05 11:20:12.083 INFO [stderr] error: aborting due to previous error
Dec 05 11:20:12.083 INFO [stderr] 
Dec 05 11:20:12.083 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 05 11:20:12.123 INFO [stderr] error: Could not compile `kg-utils`.
Dec 05 11:20:12.123 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 05 11:20:14.003 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 05 11:20:14.003 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-utils-0.2.3/src/collections/sparse_set.rs:231:11
Dec 05 11:20:14.003 INFO [stderr]     |
Dec 05 11:20:14.004 INFO [stderr] 231 |     match Layout::array::<T>(size) {
Dec 05 11:20:14.004 INFO [stderr]     |           ^^^^^^^^^^^^^^^^^^
Dec 05 11:20:14.004 INFO [stderr]     |
Dec 05 11:20:14.004 INFO [stderr]     = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 05 11:20:14.005 INFO [stderr] 
Dec 05 11:20:14.443 INFO [stderr] error: aborting due to previous error
Dec 05 11:20:14.443 INFO [stderr] 
Dec 05 11:20:14.443 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 05 11:20:14.463 INFO [stderr] error: Could not compile `kg-utils`.
Dec 05 11:20:14.463 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 05 11:20:35.027 INFO [stderr] error: build failed
Dec 05 11:20:35.043 INFO [stderr] su: No module specific data is present
Dec 05 11:20:36.469 INFO running `"docker" "inspect" "8c3bec7915f1c93660c0c10f0f93b0595170e3cf29fad7ec4d703c79fa38e634"`
Dec 05 11:20:36.933 INFO running `"docker" "rm" "-f" "8c3bec7915f1c93660c0c10f0f93b0595170e3cf29fad7ec4d703c79fa38e634"`
Dec 05 11:20:37.334 INFO [stdout] 8c3bec7915f1c93660c0c10f0f93b0595170e3cf29fad7ec4d703c79fa38e634