Dec 15 06:51:03.752 INFO testing kg-tree-0.1.1 against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 15 06:51:03.752 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-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 15 06:51:04.135 INFO [stdout] b56a1fd851569c31044b271cf67f934f9552373786e7d9c33f4e4311dd3b7795
Dec 15 06:51:04.141 INFO running `"docker" "start" "-a" "b56a1fd851569c31044b271cf67f934f9552373786e7d9c33f4e4311dd3b7795"`
Dec 15 06:51:04.634 INFO [stderr] usermod: no changes
Dec 15 06:51:04.763 INFO [stderr]    Compiling kg-utils v0.2.3
Dec 15 06:51:04.769 INFO [stderr]    Compiling syn v0.15.22
Dec 15 06:51:04.769 INFO [stderr]    Compiling heapsize_derive v0.1.4
Dec 15 06:51:04.769 INFO [stderr]    Compiling kg-display v0.1.1
Dec 15 06:51:04.775 INFO [stderr]    Compiling parking_lot_core v0.3.1
Dec 15 06:51:06.243 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 15 06:51:06.243 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/kg-utils-0.2.3/src/collections/sparse_set.rs:231:11
Dec 15 06:51:06.243 INFO [stderr]     |
Dec 15 06:51:06.243 INFO [stderr] 231 |     match Layout::array::<T>(size) {
Dec 15 06:51:06.243 INFO [stderr]     |           ^^^^^^^^^^^^^^^^^^
Dec 15 06:51:06.243 INFO [stderr]     |
Dec 15 06:51:06.243 INFO [stderr]     = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 15 06:51:06.243 INFO [stderr] 
Dec 15 06:51:06.375 INFO [stderr] error: aborting due to previous error
Dec 15 06:51:06.375 INFO [stderr] 
Dec 15 06:51:06.375 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 15 06:51:06.378 INFO [stderr] error: Could not compile `kg-utils`.
Dec 15 06:51:06.378 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 15 06:51:27.207 INFO [stderr] error: build failed
Dec 15 06:51:27.223 INFO [stderr] su: No module specific data is present
Dec 15 06:51:27.875 INFO running `"docker" "inspect" "b56a1fd851569c31044b271cf67f934f9552373786e7d9c33f4e4311dd3b7795"`
Dec 15 06:51:28.054 INFO running `"docker" "rm" "-f" "b56a1fd851569c31044b271cf67f934f9552373786e7d9c33f4e4311dd3b7795"`
Dec 15 06:51:28.259 INFO [stdout] b56a1fd851569c31044b271cf67f934f9552373786e7d9c33f4e4311dd3b7795