Aug 11 11:45:39.272 INFO checking heapless-0.3.6 against try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy for libc-1
Aug 11 11:45:39.272 INFO running: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 11:45:39.273 INFO creating container for: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 11:45:39.273 INFO running `"docker" "create" "-v" "/tmp/crater.dGVoddvSbWv1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-6/try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy:/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 +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 11 11:45:39.616 INFO blam! 3d71db2e06f84fd87feb31745018653b3c91acdeaa68e3e0410add74730a8dc0
Aug 11 11:45:39.618 INFO running `"docker" "start" "-a" "3d71db2e06f84fd87feb31745018653b3c91acdeaa68e3e0410add74730a8dc0"`
Aug 11 11:45:40.651 INFO kablam!     Checking hash32 v0.1.0
Aug 11 11:45:41.352 INFO kablam!     Checking heapless v0.3.6 (file:///source)
Aug 11 11:45:44.921 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 11 11:45:44.921 INFO kablam!   --> src/__core.rs:43:9
Aug 11 11:45:44.921 INFO kablam!    |
Aug 11 11:45:44.921 INFO kablam! 43 |         U { none: () }.some
Aug 11 11:45:44.921 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^
Aug 11 11:45:44.936 INFO kablam!    |
Aug 11 11:45:44.937 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 11 11:45:44.937 INFO kablam! 
Aug 11 11:45:44.965 INFO kablam! error: aborting due to previous error
Aug 11 11:45:44.965 INFO kablam! 
Aug 11 11:45:44.965 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 11 11:45:44.972 INFO kablam! error: Could not compile `heapless`.
Aug 11 11:45:44.972 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 11:45:47.187 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 11 11:45:47.187 INFO kablam!   --> src/__core.rs:43:9
Aug 11 11:45:47.187 INFO kablam!    |
Aug 11 11:45:47.187 INFO kablam! 43 |         U { none: () }.some
Aug 11 11:45:47.188 INFO kablam!    |         ^^^^^^^^^^^^^^^^^^^
Aug 11 11:45:47.188 INFO kablam!    |
Aug 11 11:45:47.188 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 11 11:45:47.188 INFO kablam! 
Aug 11 11:45:47.214 INFO kablam! error: aborting due to previous error
Aug 11 11:45:47.214 INFO kablam! 
Aug 11 11:45:47.214 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 11 11:45:47.224 INFO kablam! error: Could not compile `heapless`.
Aug 11 11:45:47.224 INFO kablam! 
Aug 11 11:45:47.224 INFO kablam! To learn more, run the command again with --verbose.
Aug 11 11:45:47.225 INFO kablam! su: No module specific data is present
Aug 11 11:45:48.278 INFO running `"docker" "rm" "-f" "3d71db2e06f84fd87feb31745018653b3c91acdeaa68e3e0410add74730a8dc0"`
Aug 11 11:45:48.484 INFO blam! 3d71db2e06f84fd87feb31745018653b3c91acdeaa68e3e0410add74730a8dc0