Aug 11 11:45:40.008 INFO checking heapless-0.3.6 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 11:45:40.008 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 11:45:40.008 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 11:45:40.008 INFO running `"docker" "create" "-v" "/tmp/crater.cHZp20ALHyGs:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-2/master#f6d43ed84207c7e58f363f46e5a438ff40f2b311:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 11 11:45:40.251 INFO blam! 9e1365f170ddf6c7db1accd89842465ce013b9f1990b835f32b292699c4629ba
Aug 11 11:45:40.253 INFO running `"docker" "start" "-a" "9e1365f170ddf6c7db1accd89842465ce013b9f1990b835f32b292699c4629ba"`
Aug 11 11:45:41.186 INFO kablam!     Checking hash32 v0.1.0
Aug 11 11:45:41.787 INFO kablam!     Checking heapless v0.3.6 (file:///source)
Aug 11 11:45:45.953 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 11 11:45:45.953 INFO kablam!   --> src/__core.rs:43:9
Aug 11 11:45:45.953 INFO kablam!    |
Aug 11 11:45:45.953 INFO kablam! 43 |         U { none: () }.some
Aug 11 11:45:45.954 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^
Aug 11 11:45:45.954 INFO kablam!    |
Aug 11 11:45:45.954 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 11 11:45:45.954 INFO kablam! 
Aug 11 11:45:45.972 INFO kablam! error: aborting due to previous error
Aug 11 11:45:45.972 INFO kablam! 
Aug 11 11:45:45.972 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 11 11:45:45.994 INFO kablam! error: Could not compile `heapless`.
Aug 11 11:45:45.994 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 11:45:47.372 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 11 11:45:47.372 INFO kablam!   --> src/__core.rs:43:9
Aug 11 11:45:47.372 INFO kablam!    |
Aug 11 11:45:47.373 INFO kablam! 43 |         U { none: () }.some
Aug 11 11:45:47.373 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^
Aug 11 11:45:47.373 INFO kablam!    |
Aug 11 11:45:47.373 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 11 11:45:47.373 INFO kablam! 
Aug 11 11:45:47.402 INFO kablam! error: aborting due to previous error
Aug 11 11:45:47.402 INFO kablam! 
Aug 11 11:45:47.402 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 11 11:45:47.411 INFO kablam! error: Could not compile `heapless`.
Aug 11 11:45:47.411 INFO kablam! 
Aug 11 11:45:47.411 INFO kablam! To learn more, run the command again with --verbose.
Aug 11 11:45:47.412 INFO kablam! su: No module specific data is present
Aug 11 11:45:48.531 INFO running `"docker" "rm" "-f" "9e1365f170ddf6c7db1accd89842465ce013b9f1990b835f32b292699c4629ba"`
Aug 11 11:45:48.727 INFO blam! 9e1365f170ddf6c7db1accd89842465ce013b9f1990b835f32b292699c4629ba