Aug 01 20:17:56.912 INFO checking tokio-coap-0.2.0 against 1.27.2 for lazy_static-1
Aug 01 20:17:56.912 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 20:17:56.912 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 20:17:56.912 INFO running `"docker" "create" "-v" "/tmp/crater.QcvskdAmfW98:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-7/1.27.2:/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 20:17:57.095 INFO blam! 52390df5765c9c49b29ed2b0965735cb6782a0553470658b1a1219644fab709a
Aug 01 20:17:57.097 INFO running `"docker" "start" "-a" "52390df5765c9c49b29ed2b0965735cb6782a0553470658b1a1219644fab709a"`
Aug 01 20:17:58.653 INFO kablam!     Checking smallvec v0.5.1
Aug 01 20:18:00.036 INFO kablam!     Checking tokio-coap v0.2.0 (file:///source)
Aug 01 20:18:03.407 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 20:18:03.407 INFO kablam!  --> benches/message.rs:1:1
Aug 01 20:18:03.407 INFO kablam!   |
Aug 01 20:18:03.407 INFO kablam! 1 | #![feature(test)]
Aug 01 20:18:03.407 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 20:18:03.407 INFO kablam! 
Aug 01 20:18:03.407 INFO kablam! error: aborting due to previous error
Aug 01 20:18:03.407 INFO kablam! 
Aug 01 20:18:03.408 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 20:18:03.425 INFO kablam! error: Could not compile `tokio-coap`.
Aug 01 20:18:03.425 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 20:18:03.690 INFO kablam! error: build failed
Aug 01 20:18:03.692 INFO kablam! su: No module specific data is present
Aug 01 20:18:04.479 INFO running `"docker" "rm" "-f" "52390df5765c9c49b29ed2b0965735cb6782a0553470658b1a1219644fab709a"`
Aug 01 20:18:04.610 INFO blam! 52390df5765c9c49b29ed2b0965735cb6782a0553470658b1a1219644fab709a