Aug 02 02:46:07.192 INFO checking pairing-0.14.2 against 1.27.2+tmplazy for lazy_static-1
Aug 02 02:46:07.192 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 02:46:07.192 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 02:46:07.192 INFO running `"docker" "create" "-v" "/tmp/crater.0Az93SxI6wVU:/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 02:46:07.406 INFO blam! 048c85cd25067707fbbee4eea962ce2fd2c48ef4344fc6f7934e61a8725dd60c
Aug 02 02:46:07.407 INFO running `"docker" "start" "-a" "048c85cd25067707fbbee4eea962ce2fd2c48ef4344fc6f7934e61a8725dd60c"`
Aug 02 02:46:08.950 INFO kablam!     Checking pairing v0.14.2 (file:///source)
Aug 02 02:46:18.947 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 02:46:18.947 INFO kablam!  --> benches/pairing_benches.rs:1:1
Aug 02 02:46:18.947 INFO kablam!   |
Aug 02 02:46:18.947 INFO kablam! 1 | #![feature(test)]
Aug 02 02:46:18.947 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 02:46:18.956 INFO kablam! 
Aug 02 02:46:18.958 INFO kablam! error: aborting due to previous error
Aug 02 02:46:18.958 INFO kablam! 
Aug 02 02:46:18.958 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 02:46:18.966 INFO kablam! error: Could not compile `pairing`.
Aug 02 02:46:18.967 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 02:46:23.645 INFO kablam! error: build failed
Aug 02 02:46:23.647 INFO kablam! su: No module specific data is present
Aug 02 02:46:24.406 INFO running `"docker" "rm" "-f" "048c85cd25067707fbbee4eea962ce2fd2c48ef4344fc6f7934e61a8725dd60c"`
Aug 02 02:46:24.591 INFO blam! 048c85cd25067707fbbee4eea962ce2fd2c48ef4344fc6f7934e61a8725dd60c