Aug 02 13:38:16.647 INFO checking bytes-0.4.8 against 1.27.2 for lazy_static-1
Aug 02 13:38:16.647 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 13:38:16.647 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 13:38:16.647 INFO running `"docker" "create" "-v" "/tmp/crater.1Q7vzo5DOEsg:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2:/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 13:38:16.888 INFO blam! 5141d1f3a53afce2beb4436b8a164747dc72702cd0d019334596eed535836213
Aug 02 13:38:16.892 INFO running `"docker" "start" "-a" "5141d1f3a53afce2beb4436b8a164747dc72702cd0d019334596eed535836213"`
Aug 02 13:38:18.144 INFO kablam!     Checking bytes v0.4.8 (file:///source)
Aug 02 13:38:22.748 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 13:38:22.748 INFO kablam!  --> benches/bytes.rs:1:1
Aug 02 13:38:22.748 INFO kablam!   |
Aug 02 13:38:22.748 INFO kablam! 1 | #![feature(test)]
Aug 02 13:38:22.748 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 13:38:22.748 INFO kablam! 
Aug 02 13:38:22.749 INFO kablam! error: aborting due to previous error
Aug 02 13:38:22.749 INFO kablam! 
Aug 02 13:38:22.749 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 13:38:22.803 INFO kablam! error: Could not compile `bytes`.
Aug 02 13:38:22.803 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 13:38:24.496 INFO kablam! error: build failed
Aug 02 13:38:24.498 INFO kablam! su: No module specific data is present
Aug 02 13:38:25.249 INFO running `"docker" "rm" "-f" "5141d1f3a53afce2beb4436b8a164747dc72702cd0d019334596eed535836213"`
Aug 02 13:38:25.376 INFO blam! 5141d1f3a53afce2beb4436b8a164747dc72702cd0d019334596eed535836213