Aug 02 11:50:27.312 INFO checking david-set-0.1.2 against 1.27.2 for lazy_static-1
Aug 02 11:50:27.312 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 11:50:27.312 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 11:50:27.312 INFO running `"docker" "create" "-v" "/tmp/crater.R9SLzRngfzqg:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2:/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 11:50:27.565 INFO blam! 3837df51c0429c599424f2ecb64491d30e14d18ccf51f937a4067faa3412f603
Aug 02 11:50:27.586 INFO running `"docker" "start" "-a" "3837df51c0429c599424f2ecb64491d30e14d18ccf51f937a4067faa3412f603"`
Aug 02 11:50:28.542 INFO kablam!     Checking david-set v0.1.2 (file:///source)
Aug 02 11:50:30.645 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 11:50:30.645 INFO kablam!  --> benches/bench.rs:1:1
Aug 02 11:50:30.645 INFO kablam!   |
Aug 02 11:50:30.645 INFO kablam! 1 | #![feature(test)]
Aug 02 11:50:30.645 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 11:50:30.645 INFO kablam! 
Aug 02 11:50:30.647 INFO kablam! error: aborting due to previous error
Aug 02 11:50:30.647 INFO kablam! 
Aug 02 11:50:30.647 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 11:50:30.662 INFO kablam! error: Could not compile `david-set`.
Aug 02 11:50:30.662 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 11:50:31.469 INFO kablam! error: build failed
Aug 02 11:50:31.470 INFO kablam! su: No module specific data is present
Aug 02 11:50:32.288 INFO running `"docker" "rm" "-f" "3837df51c0429c599424f2ecb64491d30e14d18ccf51f937a4067faa3412f603"`
Aug 02 11:50:32.433 INFO blam! 3837df51c0429c599424f2ecb64491d30e14d18ccf51f937a4067faa3412f603