Aug 02 12:29:10.599 INFO checking conllx-0.10.2 against 1.27.2+tmplazy for lazy_static-1
Aug 02 12:29:10.599 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:29:10.599 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:29:10.599 INFO running `"docker" "create" "-v" "/tmp/crater.FtxZasG0HN4Z:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-4/1.27.2+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 12:29:10.856 INFO blam! 7513749361b0756be796cf4eb8fc61eb3dfbc840d016b03695a5fe333f242c8b
Aug 02 12:29:10.856 INFO running `"docker" "start" "-a" "7513749361b0756be796cf4eb8fc61eb3dfbc840d016b03695a5fe333f242c8b"`
Aug 02 12:29:11.921 INFO kablam!     Checking conllx v0.10.2 (file:///source)
Aug 02 12:29:15.529 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:29:15.529 INFO kablam!  --> benches/features.rs:1:1
Aug 02 12:29:15.529 INFO kablam!   |
Aug 02 12:29:15.529 INFO kablam! 1 | #![feature(test)]
Aug 02 12:29:15.529 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 12:29:15.529 INFO kablam! 
Aug 02 12:29:15.529 INFO kablam! error: aborting due to previous error
Aug 02 12:29:15.529 INFO kablam! 
Aug 02 12:29:15.529 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:29:15.536 INFO kablam! error: Could not compile `conllx`.
Aug 02 12:29:15.537 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 12:29:16.237 INFO kablam! error: build failed
Aug 02 12:29:16.239 INFO kablam! su: No module specific data is present
Aug 02 12:29:16.810 INFO running `"docker" "rm" "-f" "7513749361b0756be796cf4eb8fc61eb3dfbc840d016b03695a5fe333f242c8b"`
Aug 02 12:29:16.971 INFO blam! 7513749361b0756be796cf4eb8fc61eb3dfbc840d016b03695a5fe333f242c8b