Dec 15 06:51:07.676 INFO testing kg-symbol-0.1.8 against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 15 06:51:07.676 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-5/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/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 06:51:08.172 INFO [stdout] 0b1ccb7b9f56677726d297c46e515001c83a509ead538d4c47b41601fcbc8e59
Dec 15 06:51:08.180 INFO running `"docker" "start" "-a" "0b1ccb7b9f56677726d297c46e515001c83a509ead538d4c47b41601fcbc8e59"`
Dec 15 06:51:09.964 INFO [stderr] usermod: no changes
Dec 15 06:51:10.128 INFO [stderr]    Compiling parking_lot_core v0.3.1
Dec 15 06:51:12.243 INFO [stderr]    Compiling parking_lot v0.6.4
Dec 15 06:51:14.627 INFO [stderr]    Compiling kg-symbol v0.1.8 (/source)
Dec 15 06:51:16.255 INFO [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra' (see issue #55724)
Dec 15 06:51:16.255 INFO [stderr]   --> src/lib.rs:50:33
Dec 15 06:51:16.255 INFO [stderr]    |
Dec 15 06:51:16.255 INFO [stderr] 50 |         Layout::new::<Header>().extend(Layout::from_size_align_unchecked(len, 1)).unwrap()
Dec 15 06:51:16.255 INFO [stderr]    |                                 ^^^^^^
Dec 15 06:51:16.255 INFO [stderr]    |
Dec 15 06:51:16.255 INFO [stderr]    = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
Dec 15 06:51:16.255 INFO [stderr] 
Dec 15 06:51:16.311 INFO [stderr] error: aborting due to previous error
Dec 15 06:51:16.311 INFO [stderr] 
Dec 15 06:51:16.311 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 15 06:51:16.327 INFO [stderr] error: Could not compile `kg-symbol`.
Dec 15 06:51:16.327 INFO [stderr] 
Dec 15 06:51:16.327 INFO [stderr] To learn more, run the command again with --verbose.
Dec 15 06:51:16.328 INFO [stderr] su: No module specific data is present
Dec 15 06:51:17.303 INFO running `"docker" "inspect" "0b1ccb7b9f56677726d297c46e515001c83a509ead538d4c47b41601fcbc8e59"`
Dec 15 06:51:17.647 INFO running `"docker" "rm" "-f" "0b1ccb7b9f56677726d297c46e515001c83a509ead538d4c47b41601fcbc8e59"`
Dec 15 06:51:17.951 INFO [stdout] 0b1ccb7b9f56677726d297c46e515001c83a509ead538d4c47b41601fcbc8e59