Aug 02 09:35:05.488 INFO checking futures-locks-0.3.0 against 1.27.2 for lazy_static-1
Aug 02 09:35:05.488 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 09:35:05.488 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 09:35:05.488 INFO running `"docker" "create" "-v" "/tmp/crater.Vw5fWVqokqNS:/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 02 09:35:05.700 INFO blam! e3a778bae523c93f9a1f26a1f94beaa9fd41b1415c4f7148bb751eaca34c3f92
Aug 02 09:35:05.702 INFO running `"docker" "start" "-a" "e3a778bae523c93f9a1f26a1f94beaa9fd41b1415c4f7148bb751eaca34c3f92"`
Aug 02 09:35:06.795 INFO kablam!     Checking futures-locks v0.3.0 (file:///source)
Aug 02 09:35:10.804 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 09:35:10.804 INFO kablam!  --> benches/mutex.rs:1:1
Aug 02 09:35:10.804 INFO kablam!   |
Aug 02 09:35:10.804 INFO kablam! 1 | #![feature(test)]
Aug 02 09:35:10.804 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 09:35:10.804 INFO kablam! 
Aug 02 09:35:10.804 INFO kablam! error: aborting due to previous error
Aug 02 09:35:10.805 INFO kablam! 
Aug 02 09:35:10.805 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 09:35:10.814 INFO kablam! error: Could not compile `futures-locks`.
Aug 02 09:35:10.814 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 09:35:11.713 INFO kablam! error: build failed
Aug 02 09:35:11.715 INFO kablam! su: No module specific data is present
Aug 02 09:35:12.630 INFO running `"docker" "rm" "-f" "e3a778bae523c93f9a1f26a1f94beaa9fd41b1415c4f7148bb751eaca34c3f92"`
Aug 02 09:35:12.762 INFO blam! e3a778bae523c93f9a1f26a1f94beaa9fd41b1415c4f7148bb751eaca34c3f92