Aug 02 14:13:05.627 INFO checking bigint-4.4.0 against 1.27.2 for lazy_static-1
Aug 02 14:13:05.627 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:13:05.628 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 14:13:05.628 INFO running `"docker" "create" "-v" "/tmp/crater.wJImIQfgEwAL:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2:/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 14:13:05.927 INFO blam! 79034545996acf9eccdaffe6f8fba44cd7a15dbdfae874dd6a29a782408173e8
Aug 02 14:13:05.934 INFO running `"docker" "start" "-a" "79034545996acf9eccdaffe6f8fba44cd7a15dbdfae874dd6a29a782408173e8"`
Aug 02 14:13:07.219 INFO kablam!     Checking bigint v4.4.0 (file:///source)
Aug 02 14:13:12.407 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 14:13:12.407 INFO kablam!   --> benches/bigint.rs:15:1
Aug 02 14:13:12.407 INFO kablam!    |
Aug 02 14:13:12.407 INFO kablam! 15 | #![feature(test)]
Aug 02 14:13:12.407 INFO kablam!    | ^^^^^^^^^^^^^^^^^
Aug 02 14:13:12.407 INFO kablam! 
Aug 02 14:13:12.407 INFO kablam! error: aborting due to previous error
Aug 02 14:13:12.407 INFO kablam! 
Aug 02 14:13:12.407 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 14:13:12.414 INFO kablam! error: Could not compile `bigint`.
Aug 02 14:13:12.414 INFO kablam! 
Aug 02 14:13:12.414 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 14:13:12.415 INFO kablam! su: No module specific data is present
Aug 02 14:13:13.554 INFO running `"docker" "rm" "-f" "79034545996acf9eccdaffe6f8fba44cd7a15dbdfae874dd6a29a782408173e8"`
Aug 02 14:13:13.684 INFO blam! 79034545996acf9eccdaffe6f8fba44cd7a15dbdfae874dd6a29a782408173e8