Dec 07 09:14:56.287 INFO testing kg-tree-0.1.1 against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 07 09:14:56.288 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-3/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-alt build --frozen" "-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 07 09:14:56.747 INFO [stdout] 55b87c4bc76f1f4b821708c195a0529979f6631bf3765414924900af791e6c51
Dec 07 09:14:56.750 INFO running `"docker" "start" "-a" "55b87c4bc76f1f4b821708c195a0529979f6631bf3765414924900af791e6c51"`
Dec 07 09:14:57.796 INFO [stderr] usermod: no changes
Dec 07 09:14:58.030 INFO [stderr]    Compiling kg-utils v0.2.3
Dec 07 09:14:58.030 INFO [stderr]    Compiling synstructure v0.5.2
Dec 07 09:14:58.030 INFO [stderr]    Compiling syn v0.15.22
Dec 07 09:14:58.030 INFO [stderr]    Compiling kg-display v0.1.1
Dec 07 09:14:58.030 INFO [stderr]    Compiling parking_lot_core v0.3.1
Dec 07 09:15:00.248 INFO [stderr]    Compiling heapsize_derive v0.1.4
Dec 07 09:15:01.412 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 07 09:15:01.412 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-utils-0.2.3/src/collections/sparse_set.rs:231:11
Dec 07 09:15:01.412 INFO [stderr]     |
Dec 07 09:15:01.412 INFO [stderr] 231 |     match Layout::array::<T>(size) {
Dec 07 09:15:01.412 INFO [stderr]     |           ^^^^^^^^^^^^^^^^^^
Dec 07 09:15:01.412 INFO [stderr]     |
Dec 07 09:15:01.412 INFO [stderr]     = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 07 09:15:01.412 INFO [stderr] 
Dec 07 09:15:02.556 INFO [stderr] error: aborting due to previous error
Dec 07 09:15:02.556 INFO [stderr] 
Dec 07 09:15:02.557 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 07 09:15:02.593 INFO [stderr] error: Could not compile `kg-utils`.
Dec 07 09:15:02.594 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 07 09:15:23.708 INFO [stderr] error: build failed
Dec 07 09:15:23.714 INFO [stderr] su: No module specific data is present
Dec 07 09:15:24.796 INFO running `"docker" "inspect" "55b87c4bc76f1f4b821708c195a0529979f6631bf3765414924900af791e6c51"`
Dec 07 09:15:25.064 INFO running `"docker" "rm" "-f" "55b87c4bc76f1f4b821708c195a0529979f6631bf3765414924900af791e6c51"`
Dec 07 09:15:25.416 INFO [stdout] 55b87c4bc76f1f4b821708c195a0529979f6631bf3765414924900af791e6c51