Aug 01 19:33:40.311 INFO checking untagged-option-0.1.1 against 1.27.2 for lazy_static-1
Aug 01 19:33:40.311 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:33:40.311 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:33:40.311 INFO running `"docker" "create" "-v" "/tmp/crater.CtiZaJgGwoPw:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-5/1.27.2:/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 01 19:33:40.466 INFO blam! 26a1f892be239fd42b238a45903ecb7a3b0f5f3828304d354d8645a5d9009f9a
Aug 01 19:33:40.468 INFO running `"docker" "start" "-a" "26a1f892be239fd42b238a45903ecb7a3b0f5f3828304d354d8645a5d9009f9a"`
Aug 01 19:33:41.639 INFO kablam!     Checking untagged-option v0.1.1 (file:///source)
Aug 01 19:33:41.775 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 19:33:41.775 INFO kablam!  --> src/lib.rs:5:1
Aug 01 19:33:41.775 INFO kablam!   |
Aug 01 19:33:41.775 INFO kablam! 5 | #![feature(untagged_unions, const_fn)]
Aug 01 19:33:41.775 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 19:33:41.775 INFO kablam! 
Aug 01 19:33:41.775 INFO kablam! error: aborting due to previous error
Aug 01 19:33:41.775 INFO kablam! 
Aug 01 19:33:41.776 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 19:33:41.781 INFO kablam! error: Could not compile `untagged-option`.
Aug 01 19:33:41.781 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 19:33:41.910 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 19:33:41.910 INFO kablam!  --> src/lib.rs:5:1
Aug 01 19:33:41.910 INFO kablam!   |
Aug 01 19:33:41.910 INFO kablam! 5 | #![feature(untagged_unions, const_fn)]
Aug 01 19:33:41.910 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 19:33:41.910 INFO kablam! 
Aug 01 19:33:41.911 INFO kablam! error: aborting due to previous error
Aug 01 19:33:41.911 INFO kablam! 
Aug 01 19:33:41.911 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 19:33:41.917 INFO kablam! error: Could not compile `untagged-option`.
Aug 01 19:33:41.918 INFO kablam! 
Aug 01 19:33:41.918 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 19:33:41.919 INFO kablam! su: No module specific data is present
Aug 01 19:33:42.656 INFO running `"docker" "rm" "-f" "26a1f892be239fd42b238a45903ecb7a3b0f5f3828304d354d8645a5d9009f9a"`
Aug 01 19:33:42.788 INFO blam! 26a1f892be239fd42b238a45903ecb7a3b0f5f3828304d354d8645a5d9009f9a