Dec 18 14:39:49.172 INFO checking kg-display-derive-0.1.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 14:39:49.172 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/kg-display-derive/0.1.0:/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 14:39:49.560 INFO [stdout] bdf00f7d23a19d2d8682d85f418c45703542a18e4c120194a999783a0ca15ffe
Dec 18 14:39:49.562 INFO running `"docker" "start" "-a" "bdf00f7d23a19d2d8682d85f418c45703542a18e4c120194a999783a0ca15ffe"`
Dec 18 14:39:50.618 INFO [stderr]    Compiling heapsize v0.4.2
Dec 18 14:39:50.618 INFO [stderr]    Compiling memchr v2.1.2
Dec 18 14:39:50.618 INFO [stderr]     Checking kg-utils v0.2.3
Dec 18 14:39:50.618 INFO [stderr]    Compiling syn v0.15.23
Dec 18 14:39:50.618 INFO [stderr]     Checking kg-display v0.1.1
Dec 18 14:39:53.445 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 18 14:39:53.445 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-utils-0.2.3/src/collections/sparse_set.rs:231:11
Dec 18 14:39:53.445 INFO [stderr]     |
Dec 18 14:39:53.445 INFO [stderr] 231 |     match Layout::array::<T>(size) {
Dec 18 14:39:53.445 INFO [stderr]     |           ^^^^^^^^^^^^^^^^^^
Dec 18 14:39:53.445 INFO [stderr]     |
Dec 18 14:39:53.445 INFO [stderr]     = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 18 14:39:53.445 INFO [stderr] 
Dec 18 14:39:53.844 INFO [stderr] error: aborting due to previous error
Dec 18 14:39:53.844 INFO [stderr] 
Dec 18 14:39:53.844 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 18 14:39:53.883 INFO [stderr] error: Could not compile `kg-utils`.
Dec 18 14:39:53.883 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 18 14:39:54.671 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 18 14:39:54.672 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-utils-0.2.3/src/collections/sparse_set.rs:231:11
Dec 18 14:39:54.672 INFO [stderr]     |
Dec 18 14:39:54.672 INFO [stderr] 231 |     match Layout::array::<T>(size) {
Dec 18 14:39:54.672 INFO [stderr]     |           ^^^^^^^^^^^^^^^^^^
Dec 18 14:39:54.688 INFO [stderr]     |
Dec 18 14:39:54.692 INFO [stderr]     = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 18 14:39:54.692 INFO [stderr] 
Dec 18 14:39:55.272 INFO [stderr] error: aborting due to previous error
Dec 18 14:39:55.272 INFO [stderr] 
Dec 18 14:39:55.272 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 18 14:39:55.306 INFO [stderr] error: Could not compile `kg-utils`.
Dec 18 14:39:55.306 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 18 14:40:15.400 INFO [stderr] error: build failed
Dec 18 14:40:15.890 INFO running `"docker" "inspect" "bdf00f7d23a19d2d8682d85f418c45703542a18e4c120194a999783a0ca15ffe"`
Dec 18 14:40:16.118 INFO running `"docker" "rm" "-f" "bdf00f7d23a19d2d8682d85f418c45703542a18e4c120194a999783a0ca15ffe"`
Dec 18 14:40:16.376 INFO [stdout] bdf00f7d23a19d2d8682d85f418c45703542a18e4c120194a999783a0ca15ffe