Aug 17 10:08:12.571 INFO checking slot-0.2.4 against try#a5d98b025f62ace80fe9d2a15781f900fc42515e for pr-53426
Aug 17 10:08:12.571 INFO running: cargo +a5d98b025f62ace80fe9d2a15781f900fc42515e-alt check --frozen --all --all-targets
Aug 17 10:08:12.571 INFO creating container for: cargo +a5d98b025f62ace80fe9d2a15781f900fc42515e-alt check --frozen --all --all-targets
Aug 17 10:08:12.571 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53426/try#a5d98b025f62ace80fe9d2a15781f900fc42515e:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53426/worker-3/try#a5d98b025f62ace80fe9d2a15781f900fc42515e:/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 +a5d98b025f62ace80fe9d2a15781f900fc42515e-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 17 10:08:12.816 INFO blam! 7c93520938c197688c9db9044716f853deea03e8ec6123cf22a3453171806400
Aug 17 10:08:12.816 INFO running `"docker" "start" "-a" "7c93520938c197688c9db9044716f853deea03e8ec6123cf22a3453171806400"`
Aug 17 10:08:13.751 INFO kablam!     Checking slot v0.2.4 (file:///source)
Aug 17 10:08:14.162 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 17 10:08:14.162 INFO kablam!   --> src/lib.rs:17:18
Aug 17 10:08:14.162 INFO kablam!    |
Aug 17 10:08:14.162 INFO kablam! 17 |         unsafe { U { u: () }.v }
Aug 17 10:08:14.162 INFO kablam!    |                  ^^^^^^^^^^^^^
Aug 17 10:08:14.162 INFO kablam!    |
Aug 17 10:08:14.162 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 17 10:08:14.162 INFO kablam! 
Aug 17 10:08:14.183 INFO kablam! error: aborting due to previous error
Aug 17 10:08:14.183 INFO kablam! 
Aug 17 10:08:14.183 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 17 10:08:14.191 INFO kablam! error: Could not compile `slot`.
Aug 17 10:08:14.192 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 17 10:08:14.396 INFO kablam! error[E0658]: unions in const fn are unstable (see issue #51909)
Aug 17 10:08:14.396 INFO kablam!   --> src/lib.rs:17:18
Aug 17 10:08:14.396 INFO kablam!    |
Aug 17 10:08:14.397 INFO kablam! 17 |         unsafe { U { u: () }.v }
Aug 17 10:08:14.397 INFO kablam!    |                  ^^^^^^^^^^^^^
Aug 17 10:08:14.397 INFO kablam!    |
Aug 17 10:08:14.397 INFO kablam!    = help: add #![feature(const_fn_union)] to the crate attributes to enable
Aug 17 10:08:14.397 INFO kablam! 
Aug 17 10:08:14.402 INFO kablam! error: aborting due to previous error
Aug 17 10:08:14.402 INFO kablam! 
Aug 17 10:08:14.402 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Aug 17 10:08:14.410 INFO kablam! error: Could not compile `slot`.
Aug 17 10:08:14.410 INFO kablam! 
Aug 17 10:08:14.410 INFO kablam! To learn more, run the command again with --verbose.
Aug 17 10:08:14.412 INFO kablam! su: No module specific data is present
Aug 17 10:08:15.036 INFO running `"docker" "rm" "-f" "7c93520938c197688c9db9044716f853deea03e8ec6123cf22a3453171806400"`
Aug 17 10:08:15.222 INFO blam! 7c93520938c197688c9db9044716f853deea03e8ec6123cf22a3453171806400