Aug 11 17:17:15.606 INFO checking const-concat-0.1.0 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 17:17:15.606 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 17:17:15.606 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 17:17:15.606 INFO running `"docker" "create" "-v" "/tmp/crater.5IOw3Vvv1n0X:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-6/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 17:17:15.890 INFO blam! cbaa3d32673a9f12758b7457f25c8e2d0d47b908e0c8f73db612a13a4323535d
Aug 11 17:17:15.892 INFO running `"docker" "start" "-a" "cbaa3d32673a9f12758b7457f25c8e2d0d47b908e0c8f73db612a13a4323535d"`
Aug 11 17:17:17.687 INFO kablam!     Checking const-concat v0.1.0 (file:///source)
Aug 11 17:17:18.245 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 11 17:17:18.245 INFO kablam!   --> src/lib.rs:10:5
Aug 11 17:17:18.245 INFO kablam!    |
Aug 11 17:17:18.245 INFO kablam! 10 |     Transmute { from }.to
Aug 11 17:17:18.246 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 17:17:18.246 INFO kablam!    |
Aug 11 17:17:18.246 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 11 17:17:18.246 INFO kablam! 
Aug 11 17:17:18.250 INFO kablam! error: aborting due to previous error
Aug 11 17:17:18.250 INFO kablam! 
Aug 11 17:17:18.250 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 11 17:17:18.260 INFO kablam! error: Could not compile `const-concat`.
Aug 11 17:17:18.260 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 17:17:18.366 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 11 17:17:18.366 INFO kablam!   --> src/lib.rs:10:5
Aug 11 17:17:18.366 INFO kablam!    |
Aug 11 17:17:18.366 INFO kablam! 10 |     Transmute { from }.to
Aug 11 17:17:18.366 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 17:17:18.366 INFO kablam!    |
Aug 11 17:17:18.366 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 11 17:17:18.366 INFO kablam! 
Aug 11 17:17:18.484 INFO kablam! error[E0308]: mismatched types
Aug 11 17:17:18.484 INFO kablam!   --> src/lib.rs:33:13
Aug 11 17:17:18.484 INFO kablam!    |
Aug 11 17:17:18.484 INFO kablam! 33 | /             &$crate::concat::<
Aug 11 17:17:18.484 INFO kablam! 34 | |                 [u8; $a.len()],
Aug 11 17:17:18.484 INFO kablam! 35 | |                 [u8; $b.len()],
Aug 11 17:17:18.484 INFO kablam! 36 | |                 [u8; $a.len() + $b.len()],
Aug 11 17:17:18.484 INFO kablam! 37 | |             >($a.as_bytes(), $b.as_bytes())
Aug 11 17:17:18.484 INFO kablam!    | |___________________________________________^ expected slice, found array
Aug 11 17:17:18.484 INFO kablam! ...
Aug 11 17:17:18.484 INFO kablam! 57 |           const GREETING: &str = const_concat!(SALUTATION, ", ", TARGET, "!");
Aug 11 17:17:18.484 INFO kablam!    |                                  -------------------------------------------- in this macro invocation
Aug 11 17:17:18.484 INFO kablam!    |
Aug 11 17:17:18.484 INFO kablam!    = note: expected type `&'static [u8]`
Aug 11 17:17:18.484 INFO kablam!               found type `&[u8; _]`
Aug 11 17:17:18.484 INFO kablam! 
Aug 11 17:17:18.506 INFO kablam! error: aborting due to 2 previous errors
Aug 11 17:17:18.506 INFO kablam! 
Aug 11 17:17:18.506 INFO kablam! Some errors occurred: E0308, E0658.
Aug 11 17:17:18.506 INFO kablam! For more information about an error, try `rustc --explain E0308`.
Aug 11 17:17:18.525 INFO kablam! error: Could not compile `const-concat`.
Aug 11 17:17:18.525 INFO kablam! 
Aug 11 17:17:18.525 INFO kablam! To learn more, run the command again with --verbose.
Aug 11 17:17:18.526 INFO kablam! su: No module specific data is present
Aug 11 17:17:19.274 INFO running `"docker" "rm" "-f" "cbaa3d32673a9f12758b7457f25c8e2d0d47b908e0c8f73db612a13a4323535d"`
Aug 11 17:17:19.453 INFO blam! cbaa3d32673a9f12758b7457f25c8e2d0d47b908e0c8f73db612a13a4323535d