Aug 02 04:36:38.652 INFO checking mc-varint-0.1.1 against 1.27.2+tmplazy for lazy_static-1
Aug 02 04:36:38.652 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:36:38.652 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:36:38.653 INFO running `"docker" "create" "-v" "/tmp/crater.dVexO69JM4RB:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2+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 04:36:38.912 INFO blam! 265ff45572d543eebc551226be439d828660700799eb454f1459493f999beeea
Aug 02 04:36:38.915 INFO running `"docker" "start" "-a" "265ff45572d543eebc551226be439d828660700799eb454f1459493f999beeea"`
Aug 02 04:36:40.109 INFO kablam!     Checking mc-varint v0.1.1 (file:///source)
Aug 02 04:36:42.481 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 04:36:42.481 INFO kablam!  --> benches/var_int.rs:1:1
Aug 02 04:36:42.481 INFO kablam!   |
Aug 02 04:36:42.481 INFO kablam! 1 | #![feature(test)]
Aug 02 04:36:42.481 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 04:36:42.481 INFO kablam! 
Aug 02 04:36:42.482 INFO kablam! error: aborting due to previous error
Aug 02 04:36:42.482 INFO kablam! 
Aug 02 04:36:42.482 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 04:36:42.507 INFO kablam! error: Could not compile `mc-varint`.
Aug 02 04:36:42.508 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 04:36:42.818 INFO kablam! error: build failed
Aug 02 04:36:42.820 INFO kablam! su: No module specific data is present
Aug 02 04:36:43.402 INFO running `"docker" "rm" "-f" "265ff45572d543eebc551226be439d828660700799eb454f1459493f999beeea"`
Aug 02 04:36:43.568 INFO blam! 265ff45572d543eebc551226be439d828660700799eb454f1459493f999beeea