Aug 01 21:29:57.974 INFO checking staccato-0.1.8 against 1.27.2 for lazy_static-1
Aug 01 21:29:57.974 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:29:57.974 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:29:57.974 INFO running `"docker" "create" "-v" "/tmp/crater.Uf34qVsw3MKl:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-4/1.27.2:/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 21:29:58.251 INFO blam! 16e41d10ecfe43a978a5731bf8a389a2b11f396181fc5b95cbf7e47d1a5169e9
Aug 01 21:29:58.253 INFO running `"docker" "start" "-a" "16e41d10ecfe43a978a5731bf8a389a2b11f396181fc5b95cbf7e47d1a5169e9"`
Aug 01 21:29:59.415 INFO kablam!     Checking staccato v0.1.8 (file:///source)
Aug 01 21:30:01.783 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:30:01.783 INFO kablam!  --> benches/lib.rs:1:1
Aug 01 21:30:01.783 INFO kablam!   |
Aug 01 21:30:01.783 INFO kablam! 1 | #![feature(test)]
Aug 01 21:30:01.783 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 21:30:01.783 INFO kablam! 
Aug 01 21:30:01.783 INFO kablam! error: aborting due to previous error
Aug 01 21:30:01.783 INFO kablam! 
Aug 01 21:30:01.784 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:30:01.810 INFO kablam! error: Could not compile `staccato`.
Aug 01 21:30:01.810 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:30:02.509 INFO kablam! error: build failed
Aug 01 21:30:02.509 INFO kablam! su: No module specific data is present
Aug 01 21:30:03.407 INFO running `"docker" "rm" "-f" "16e41d10ecfe43a978a5731bf8a389a2b11f396181fc5b95cbf7e47d1a5169e9"`
Aug 01 21:30:03.511 INFO blam! 16e41d10ecfe43a978a5731bf8a389a2b11f396181fc5b95cbf7e47d1a5169e9