Sep 04 23:49:56.620 INFO checking const-concat-0.1.0 against master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8 for pr-53913
Sep 04 23:49:56.620 INFO running: cargo +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets
Sep 04 23:49:56.620 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53913/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53913/worker-0/master#2687112ea6a8701cbf36e6dd4d77d64694cf93d8:/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 +2687112ea6a8701cbf36e6dd4d77d64694cf93d8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 23:49:56.819 INFO blam! 4a775c614a468cbe267fe010bbd765bc400831d93c74ef945a6e3721abf61cb4
Sep 04 23:49:56.821 INFO running `"docker" "start" "-a" "4a775c614a468cbe267fe010bbd765bc400831d93c74ef945a6e3721abf61cb4"`
Sep 04 23:49:57.463 INFO kablam!     Checking const-concat v0.1.0 (file:///source)
Sep 04 23:49:58.029 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Sep 04 23:49:58.029 INFO kablam!   --> src/lib.rs:10:5
Sep 04 23:49:58.029 INFO kablam!    |
Sep 04 23:49:58.029 INFO kablam! 10 |     Transmute { from }.to
Sep 04 23:49:58.029 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Sep 04 23:49:58.029 INFO kablam!    |
Sep 04 23:49:58.029 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Sep 04 23:49:58.029 INFO kablam! 
Sep 04 23:49:58.031 INFO kablam! error: aborting due to previous error
Sep 04 23:49:58.031 INFO kablam! 
Sep 04 23:49:58.031 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 04 23:49:58.036 INFO kablam! error: Could not compile `const-concat`.
Sep 04 23:49:58.036 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 04 23:49:58.134 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Sep 04 23:49:58.134 INFO kablam!   --> src/lib.rs:10:5
Sep 04 23:49:58.134 INFO kablam!    |
Sep 04 23:49:58.134 INFO kablam! 10 |     Transmute { from }.to
Sep 04 23:49:58.134 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Sep 04 23:49:58.134 INFO kablam!    |
Sep 04 23:49:58.134 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Sep 04 23:49:58.134 INFO kablam! 
Sep 04 23:49:58.196 INFO kablam! error[E0308]: mismatched types
Sep 04 23:49:58.196 INFO kablam!   --> src/lib.rs:33:13
Sep 04 23:49:58.196 INFO kablam!    |
Sep 04 23:49:58.196 INFO kablam! 33 | /             &$crate::concat::<
Sep 04 23:49:58.196 INFO kablam! 34 | |                 [u8; $a.len()],
Sep 04 23:49:58.196 INFO kablam! 35 | |                 [u8; $b.len()],
Sep 04 23:49:58.196 INFO kablam! 36 | |                 [u8; $a.len() + $b.len()],
Sep 04 23:49:58.196 INFO kablam! 37 | |             >($a.as_bytes(), $b.as_bytes())
Sep 04 23:49:58.196 INFO kablam!    | |___________________________________________^ expected slice, found array
Sep 04 23:49:58.197 INFO kablam! ...
Sep 04 23:49:58.197 INFO kablam! 57 |           const GREETING: &str = const_concat!(SALUTATION, ", ", TARGET, "!");
Sep 04 23:49:58.197 INFO kablam!    |                                  -------------------------------------------- in this macro invocation
Sep 04 23:49:58.197 INFO kablam!    |
Sep 04 23:49:58.197 INFO kablam!    = note: expected type `&'static [u8]`
Sep 04 23:49:58.197 INFO kablam!               found type `&[u8; _]`
Sep 04 23:49:58.197 INFO kablam! 
Sep 04 23:49:58.214 INFO kablam! error: aborting due to 2 previous errors
Sep 04 23:49:58.215 INFO kablam! 
Sep 04 23:49:58.215 INFO kablam! Some errors occurred: E0308, E0658.
Sep 04 23:49:58.215 INFO kablam! For more information about an error, try `rustc --explain E0308`.
Sep 04 23:49:58.223 INFO kablam! error: Could not compile `const-concat`.
Sep 04 23:49:58.223 INFO kablam! 
Sep 04 23:49:58.223 INFO kablam! To learn more, run the command again with --verbose.
Sep 04 23:49:58.224 INFO kablam! su: No module specific data is present
Sep 04 23:49:58.893 INFO running `"docker" "rm" "-f" "4a775c614a468cbe267fe010bbd765bc400831d93c74ef945a6e3721abf61cb4"`
Sep 04 23:49:58.979 INFO blam! 4a775c614a468cbe267fe010bbd765bc400831d93c74ef945a6e3721abf61cb4