Sep 06 08:33:15.634 INFO checking const-concat-0.1.0 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 08:33:15.634 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 08:33:15.634 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-1/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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=1000" "-e" "CMD=cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 08:33:15.781 INFO blam! 142db288064802bbdf846c0a61d7dabaa5a40aa81d51f7dc8bbf6533316284e3
Sep 06 08:33:15.784 INFO running `"docker" "start" "-a" "142db288064802bbdf846c0a61d7dabaa5a40aa81d51f7dc8bbf6533316284e3"`
Sep 06 08:33:16.665 INFO kablam! usermod: no changes
Sep 06 08:33:16.685 INFO kablam!     Checking const-concat v0.1.0 (file:///source)
Sep 06 08:33:16.932 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Sep 06 08:33:16.932 INFO kablam!   --> src/lib.rs:10:5
Sep 06 08:33:16.932 INFO kablam!    |
Sep 06 08:33:16.932 INFO kablam! 10 |     Transmute { from }.to
Sep 06 08:33:16.932 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Sep 06 08:33:16.932 INFO kablam!    |
Sep 06 08:33:16.932 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Sep 06 08:33:16.932 INFO kablam! 
Sep 06 08:33:16.933 INFO kablam! error: aborting due to previous error
Sep 06 08:33:16.933 INFO kablam! 
Sep 06 08:33:16.933 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 06 08:33:16.939 INFO kablam! error: Could not compile `const-concat`.
Sep 06 08:33:16.939 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 06 08:33:16.974 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Sep 06 08:33:16.974 INFO kablam!   --> src/lib.rs:10:5
Sep 06 08:33:16.974 INFO kablam!    |
Sep 06 08:33:16.974 INFO kablam! 10 |     Transmute { from }.to
Sep 06 08:33:16.974 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Sep 06 08:33:16.974 INFO kablam!    |
Sep 06 08:33:16.974 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Sep 06 08:33:16.974 INFO kablam! 
Sep 06 08:33:17.019 INFO kablam! error[E0308]: mismatched types
Sep 06 08:33:17.019 INFO kablam!   --> src/lib.rs:33:13
Sep 06 08:33:17.019 INFO kablam!    |
Sep 06 08:33:17.019 INFO kablam! 33 | /             &$crate::concat::<
Sep 06 08:33:17.019 INFO kablam! 34 | |                 [u8; $a.len()],
Sep 06 08:33:17.019 INFO kablam! 35 | |                 [u8; $b.len()],
Sep 06 08:33:17.019 INFO kablam! 36 | |                 [u8; $a.len() + $b.len()],
Sep 06 08:33:17.019 INFO kablam! 37 | |             >($a.as_bytes(), $b.as_bytes())
Sep 06 08:33:17.019 INFO kablam!    | |___________________________________________^ expected slice, found array
Sep 06 08:33:17.019 INFO kablam! ...
Sep 06 08:33:17.019 INFO kablam! 57 |           const GREETING: &str = const_concat!(SALUTATION, ", ", TARGET, "!");
Sep 06 08:33:17.019 INFO kablam!    |                                  -------------------------------------------- in this macro invocation
Sep 06 08:33:17.019 INFO kablam!    |
Sep 06 08:33:17.019 INFO kablam!    = note: expected type `&'static [u8]`
Sep 06 08:33:17.019 INFO kablam!               found type `&[u8; _]`
Sep 06 08:33:17.019 INFO kablam! 
Sep 06 08:33:17.029 INFO kablam! error: aborting due to 2 previous errors
Sep 06 08:33:17.029 INFO kablam! 
Sep 06 08:33:17.029 INFO kablam! Some errors occurred: E0308, E0658.
Sep 06 08:33:17.029 INFO kablam! For more information about an error, try `rustc --explain E0308`.
Sep 06 08:33:17.037 INFO kablam! error: Could not compile `const-concat`.
Sep 06 08:33:17.037 INFO kablam! 
Sep 06 08:33:17.037 INFO kablam! To learn more, run the command again with --verbose.
Sep 06 08:33:17.039 INFO kablam! su: No module specific data is present
Sep 06 08:33:17.760 INFO running `"docker" "rm" "-f" "142db288064802bbdf846c0a61d7dabaa5a40aa81d51f7dc8bbf6533316284e3"`
Sep 06 08:33:17.867 INFO blam! 142db288064802bbdf846c0a61d7dabaa5a40aa81d51f7dc8bbf6533316284e3