Aug 01 22:23:50.758 INFO checking sha2-asm-0.5.1 against 1.27.2 for lazy_static-1
Aug 01 22:23:50.758 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 22:23:50.758 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 22:23:50.758 INFO running `"docker" "create" "-v" "/tmp/crater.dIf3GJvuLQdF:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2:/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 01 22:23:51.015 INFO blam! d079008036d3119fd9909af02a47379a9468981884f55ce8e94443910150e670
Aug 01 22:23:51.017 INFO running `"docker" "start" "-a" "d079008036d3119fd9909af02a47379a9468981884f55ce8e94443910150e670"`
Aug 01 22:23:51.856 INFO kablam!    Compiling sha2-asm v0.5.1 (file:///source)
Aug 01 22:23:54.523 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 22:23:54.523 INFO kablam!  --> benches/lib.rs:2:1
Aug 01 22:23:54.523 INFO kablam!   |
Aug 01 22:23:54.524 INFO kablam! 2 | #![feature(test)]
Aug 01 22:23:54.524 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 22:23:54.528 INFO kablam! 
Aug 01 22:23:54.529 INFO kablam! error: aborting due to previous error
Aug 01 22:23:54.529 INFO kablam! 
Aug 01 22:23:54.529 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 22:23:54.545 INFO kablam! error: Could not compile `sha2-asm`.
Aug 01 22:23:54.545 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 22:23:54.553 INFO kablam! error: build failed
Aug 01 22:23:54.555 INFO kablam! su: No module specific data is present
Aug 01 22:23:55.111 INFO running `"docker" "rm" "-f" "d079008036d3119fd9909af02a47379a9468981884f55ce8e94443910150e670"`
Aug 01 22:23:55.316 INFO blam! d079008036d3119fd9909af02a47379a9468981884f55ce8e94443910150e670