Aug 02 12:27:27.472 INFO checking const-concat-0.1.0 against 1.27.2+tmplazy for lazy_static-1
Aug 02 12:27:27.472 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:27:27.472 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:27:27.472 INFO running `"docker" "create" "-v" "/tmp/crater.kYdUaxbDxJ2J:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2+tmplazy:/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 +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 12:27:27.657 INFO blam! fec53ceaf4a296bfd3cf8350bcbd23cd47b7edb5199211d89a39abd1dc3a7022
Aug 02 12:27:27.666 INFO running `"docker" "start" "-a" "fec53ceaf4a296bfd3cf8350bcbd23cd47b7edb5199211d89a39abd1dc3a7022"`
Aug 02 12:27:28.852 INFO kablam!     Checking const-concat v0.1.0 (file:///source)
Aug 02 12:27:29.346 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:27:29.346 INFO kablam!  --> src/lib.rs:1:1
Aug 02 12:27:29.346 INFO kablam!   |
Aug 02 12:27:29.346 INFO kablam! 1 | #![feature(const_fn, const_str_as_bytes, const_str_len, const_let, untagged_unions)]
Aug 02 12:27:29.346 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 12:27:29.346 INFO kablam! 
Aug 02 12:27:29.346 INFO kablam! error: aborting due to previous error
Aug 02 12:27:29.346 INFO kablam! 
Aug 02 12:27:29.346 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:27:29.352 INFO kablam! error: Could not compile `const-concat`.
Aug 02 12:27:29.352 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 12:27:29.409 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:27:29.409 INFO kablam!  --> src/lib.rs:1:1
Aug 02 12:27:29.409 INFO kablam!   |
Aug 02 12:27:29.409 INFO kablam! 1 | #![feature(const_fn, const_str_as_bytes, const_str_len, const_let, untagged_unions)]
Aug 02 12:27:29.409 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 12:27:29.409 INFO kablam! 
Aug 02 12:27:29.409 INFO kablam! error: aborting due to previous error
Aug 02 12:27:29.409 INFO kablam! 
Aug 02 12:27:29.409 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:27:29.416 INFO kablam! error: Could not compile `const-concat`.
Aug 02 12:27:29.416 INFO kablam! 
Aug 02 12:27:29.416 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 12:27:29.417 INFO kablam! su: No module specific data is present
Aug 02 12:27:30.185 INFO running `"docker" "rm" "-f" "fec53ceaf4a296bfd3cf8350bcbd23cd47b7edb5199211d89a39abd1dc3a7022"`
Aug 02 12:27:30.324 INFO blam! fec53ceaf4a296bfd3cf8350bcbd23cd47b7edb5199211d89a39abd1dc3a7022