Aug 02 01:15:40.213 INFO checking rb-0.3.2 against 1.27.2 for lazy_static-1
Aug 02 01:15:40.213 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 01:15:40.213 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 01:15:40.213 INFO running `"docker" "create" "-v" "/tmp/crater.uCWq0iJkncvs:/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 02 01:15:40.471 INFO blam! 13aef72557215027b91d9cc59fd95a1570ab4efe437a5f4e58e255128aaac4cd
Aug 02 01:15:40.472 INFO running `"docker" "start" "-a" "13aef72557215027b91d9cc59fd95a1570ab4efe437a5f4e58e255128aaac4cd"`
Aug 02 01:15:41.443 INFO kablam!     Checking rb v0.3.2 (file:///source)
Aug 02 01:15:43.959 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 01:15:43.959 INFO kablam!  --> benches/bench.rs:1:1
Aug 02 01:15:43.959 INFO kablam!   |
Aug 02 01:15:43.959 INFO kablam! 1 | #![feature(test)]
Aug 02 01:15:43.959 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 01:15:43.959 INFO kablam! 
Aug 02 01:15:43.960 INFO kablam! error: aborting due to previous error
Aug 02 01:15:43.960 INFO kablam! 
Aug 02 01:15:43.960 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 01:15:43.973 INFO kablam! error: Could not compile `rb`.
Aug 02 01:15:43.973 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 01:15:44.842 INFO kablam! error: build failed
Aug 02 01:15:44.856 INFO kablam! su: No module specific data is present
Aug 02 01:15:45.385 INFO running `"docker" "rm" "-f" "13aef72557215027b91d9cc59fd95a1570ab4efe437a5f4e58e255128aaac4cd"`
Aug 02 01:15:45.557 INFO blam! 13aef72557215027b91d9cc59fd95a1570ab4efe437a5f4e58e255128aaac4cd