Aug 01 21:41:59.188 INFO checking sparx-0.1.1 against 1.27.2 for lazy_static-1
Aug 01 21:41:59.188 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:41:59.188 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:41:59.189 INFO running `"docker" "create" "-v" "/tmp/crater.UhogenKitDfN:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2:/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 21:41:59.374 INFO blam! b97ffbd738d77a32a0a25b4b8cb05cd1942d4dcd6cb95520db4eb199a4d79f65
Aug 01 21:41:59.377 INFO running `"docker" "start" "-a" "b97ffbd738d77a32a0a25b4b8cb05cd1942d4dcd6cb95520db4eb199a4d79f65"`
Aug 01 21:42:00.691 INFO kablam!     Checking sparx v0.1.1 (file:///source)
Aug 01 21:42:01.491 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:42:01.491 INFO kablam!  --> benches/bench.rs:1:1
Aug 01 21:42:01.491 INFO kablam!   |
Aug 01 21:42:01.491 INFO kablam! 1 | #![feature(test)]
Aug 01 21:42:01.491 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 21:42:01.491 INFO kablam! 
Aug 01 21:42:01.491 INFO kablam! error: aborting due to previous error
Aug 01 21:42:01.491 INFO kablam! 
Aug 01 21:42:01.491 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:42:01.496 INFO kablam! error: Could not compile `sparx`.
Aug 01 21:42:01.496 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:42:01.557 INFO kablam! error: build failed
Aug 01 21:42:01.559 INFO kablam! su: No module specific data is present
Aug 01 21:42:02.034 INFO running `"docker" "rm" "-f" "b97ffbd738d77a32a0a25b4b8cb05cd1942d4dcd6cb95520db4eb199a4d79f65"`
Aug 01 21:42:02.218 INFO blam! b97ffbd738d77a32a0a25b4b8cb05cd1942d4dcd6cb95520db4eb199a4d79f65