Aug 02 06:59:08.968 INFO checking id-set-0.2.2 against 1.27.2 for lazy_static-1
Aug 02 06:59:08.968 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:59:08.968 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:59:08.968 INFO running `"docker" "create" "-v" "/tmp/crater.iO3dPs1GLhG4:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2:/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 02 06:59:09.138 INFO blam! 137273a03edd9d107e0d95b8b0e8aa3a5bbd0b22d6f4b783f6fe0326247e4b69
Aug 02 06:59:09.140 INFO running `"docker" "start" "-a" "137273a03edd9d107e0d95b8b0e8aa3a5bbd0b22d6f4b783f6fe0326247e4b69"`
Aug 02 06:59:10.424 INFO kablam!     Checking id-set v0.2.2 (file:///source)
Aug 02 06:59:12.184 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:59:12.184 INFO kablam!  --> benches/benches.rs:1:1
Aug 02 06:59:12.184 INFO kablam!   |
Aug 02 06:59:12.184 INFO kablam! 1 | #![feature(test)]
Aug 02 06:59:12.184 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 06:59:12.184 INFO kablam! 
Aug 02 06:59:12.184 INFO kablam! error: aborting due to previous error
Aug 02 06:59:12.184 INFO kablam! 
Aug 02 06:59:12.184 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:59:12.191 INFO kablam! error: Could not compile `id-set`.
Aug 02 06:59:12.191 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 06:59:12.339 INFO kablam! error: build failed
Aug 02 06:59:12.340 INFO kablam! su: No module specific data is present
Aug 02 06:59:14.113 INFO running `"docker" "rm" "-f" "137273a03edd9d107e0d95b8b0e8aa3a5bbd0b22d6f4b783f6fe0326247e4b69"`
Aug 02 06:59:14.226 INFO blam! 137273a03edd9d107e0d95b8b0e8aa3a5bbd0b22d6f4b783f6fe0326247e4b69