Aug 02 06:35:38.655 INFO checking ip_network-0.2.3 against 1.27.2+tmplazy for lazy_static-1
Aug 02 06:35:38.656 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:35:38.656 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:35:38.656 INFO running `"docker" "create" "-v" "/tmp/crater.hy6EaHbya6hL:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-7/1.27.2+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 06:35:38.939 INFO blam! f109469cb30b594ff65b82ea655639891bafb206546c0c3a00bd63761651cace
Aug 02 06:35:38.941 INFO running `"docker" "start" "-a" "f109469cb30b594ff65b82ea655639891bafb206546c0c3a00bd63761651cace"`
Aug 02 06:35:40.556 INFO kablam!     Checking ip_network v0.2.3 (file:///source)
Aug 02 06:35:42.571 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:35:42.571 INFO kablam!  --> benches/bench.rs:1:1
Aug 02 06:35:42.571 INFO kablam!   |
Aug 02 06:35:42.571 INFO kablam! 1 | #![feature(test)]
Aug 02 06:35:42.571 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 06:35:42.571 INFO kablam! 
Aug 02 06:35:42.572 INFO kablam! error: aborting due to previous error
Aug 02 06:35:42.572 INFO kablam! 
Aug 02 06:35:42.572 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:35:42.580 INFO kablam! error: Could not compile `ip_network`.
Aug 02 06:35:42.580 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 06:35:43.241 INFO kablam! error: build failed
Aug 02 06:35:43.299 INFO kablam! su: No module specific data is present
Aug 02 06:35:43.939 INFO running `"docker" "rm" "-f" "f109469cb30b594ff65b82ea655639891bafb206546c0c3a00bd63761651cace"`
Aug 02 06:35:44.122 INFO blam! f109469cb30b594ff65b82ea655639891bafb206546c0c3a00bd63761651cace