Aug 30 20:59:34.461 INFO checking const-concat-0.1.0 against try#bc5a74802bb3ffc82f51ef04bca58d64220124c4 for pr-53699
Aug 30 20:59:34.461 INFO running: cargo +bc5a74802bb3ffc82f51ef04bca58d64220124c4-alt check --frozen --all --all-targets
Aug 30 20:59:34.462 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53699/try#bc5a74802bb3ffc82f51ef04bca58d64220124c4:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53699/worker-1/try#bc5a74802bb3ffc82f51ef04bca58d64220124c4:/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" "-e" "USER_ID=500" "-e" "CMD=cargo +bc5a74802bb3ffc82f51ef04bca58d64220124c4-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 20:59:34.701 INFO blam! f8883c851c1a5321b3648c36f1051b41afb49b0bb87931dac2fd727dc65f71fe
Aug 30 20:59:34.704 INFO running `"docker" "start" "-a" "f8883c851c1a5321b3648c36f1051b41afb49b0bb87931dac2fd727dc65f71fe"`
Aug 30 20:59:35.390 INFO kablam!     Checking const-concat v0.1.0 (file:///source)
Aug 30 20:59:36.171 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 30 20:59:36.171 INFO kablam!   --> src/lib.rs:10:5
Aug 30 20:59:36.171 INFO kablam!    |
Aug 30 20:59:36.172 INFO kablam! 10 |     Transmute { from }.to
Aug 30 20:59:36.172 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Aug 30 20:59:36.172 INFO kablam!    |
Aug 30 20:59:36.172 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 30 20:59:36.172 INFO kablam! 
Aug 30 20:59:36.174 INFO kablam! error: aborting due to previous error
Aug 30 20:59:36.174 INFO kablam! 
Aug 30 20:59:36.174 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 30 20:59:36.182 INFO kablam! error: Could not compile `const-concat`.
Aug 30 20:59:36.183 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 30 20:59:36.326 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 30 20:59:36.326 INFO kablam!   --> src/lib.rs:10:5
Aug 30 20:59:36.326 INFO kablam!    |
Aug 30 20:59:36.326 INFO kablam! 10 |     Transmute { from }.to
Aug 30 20:59:36.326 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Aug 30 20:59:36.326 INFO kablam!    |
Aug 30 20:59:36.326 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 30 20:59:36.326 INFO kablam! 
Aug 30 20:59:36.429 INFO kablam! error[E0308]: mismatched types
Aug 30 20:59:36.429 INFO kablam!   --> src/lib.rs:33:13
Aug 30 20:59:36.429 INFO kablam!    |
Aug 30 20:59:36.429 INFO kablam! 33 | /             &$crate::concat::<
Aug 30 20:59:36.429 INFO kablam! 34 | |                 [u8; $a.len()],
Aug 30 20:59:36.429 INFO kablam! 35 | |                 [u8; $b.len()],
Aug 30 20:59:36.429 INFO kablam! 36 | |                 [u8; $a.len() + $b.len()],
Aug 30 20:59:36.429 INFO kablam! 37 | |             >($a.as_bytes(), $b.as_bytes())
Aug 30 20:59:36.429 INFO kablam!    | |___________________________________________^ expected slice, found array
Aug 30 20:59:36.430 INFO kablam! ...
Aug 30 20:59:36.430 INFO kablam! 57 |           const GREETING: &str = const_concat!(SALUTATION, ", ", TARGET, "!");
Aug 30 20:59:36.430 INFO kablam!    |                                  -------------------------------------------- in this macro invocation
Aug 30 20:59:36.430 INFO kablam!    |
Aug 30 20:59:36.430 INFO kablam!    = note: expected type `&'static [u8]`
Aug 30 20:59:36.430 INFO kablam!               found type `&[u8; _]`
Aug 30 20:59:36.430 INFO kablam! 
Aug 30 20:59:36.449 INFO kablam! error: aborting due to 2 previous errors
Aug 30 20:59:36.449 INFO kablam! 
Aug 30 20:59:36.449 INFO kablam! Some errors occurred: E0308, E0658.
Aug 30 20:59:36.449 INFO kablam! For more information about an error, try `rustc --explain E0308`.
Aug 30 20:59:36.458 INFO kablam! error: Could not compile `const-concat`.
Aug 30 20:59:36.458 INFO kablam! 
Aug 30 20:59:36.458 INFO kablam! To learn more, run the command again with --verbose.
Aug 30 20:59:36.459 INFO kablam! su: No module specific data is present
Aug 30 20:59:36.911 INFO running `"docker" "rm" "-f" "f8883c851c1a5321b3648c36f1051b41afb49b0bb87931dac2fd727dc65f71fe"`
Aug 30 20:59:37.044 INFO blam! f8883c851c1a5321b3648c36f1051b41afb49b0bb87931dac2fd727dc65f71fe