Aug 02 07:20:51.648 INFO checking heapless-0.2.7 against 1.27.2+tmplazy for lazy_static-1
Aug 02 07:20:51.648 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 07:20:51.648 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 07:20:51.649 INFO running `"docker" "create" "-v" "/tmp/crater.l6gEueKRF29t:/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 07:20:51.945 INFO blam! 34e4f9059e2864ce5eb474c360ab0521c60864446fc5e11da60b327c4790dbd9
Aug 02 07:20:51.947 INFO running `"docker" "start" "-a" "34e4f9059e2864ce5eb474c360ab0521c60864446fc5e11da60b327c4790dbd9"`
Aug 02 07:20:53.256 INFO kablam!     Checking untagged-option v0.1.1
Aug 02 07:20:53.368 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 07:20:53.368 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/untagged-option-0.1.1/src/lib.rs:5:1
Aug 02 07:20:53.368 INFO kablam!   |
Aug 02 07:20:53.369 INFO kablam! 5 | #![feature(untagged_unions, const_fn)]
Aug 02 07:20:53.369 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 07:20:53.369 INFO kablam! 
Aug 02 07:20:53.369 INFO kablam! error: aborting due to previous error
Aug 02 07:20:53.369 INFO kablam! 
Aug 02 07:20:53.369 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 07:20:53.372 INFO kablam! error: Could not compile `untagged-option`.
Aug 02 07:20:53.372 INFO kablam! 
Aug 02 07:20:53.372 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 07:20:53.373 INFO kablam! su: No module specific data is present
Aug 02 07:20:54.462 INFO running `"docker" "rm" "-f" "34e4f9059e2864ce5eb474c360ab0521c60864446fc5e11da60b327c4790dbd9"`
Aug 02 07:20:54.614 INFO blam! 34e4f9059e2864ce5eb474c360ab0521c60864446fc5e11da60b327c4790dbd9