Aug 01 21:28:30.192 INFO checking state-0.4.1 against 1.27.2 for lazy_static-1
Aug 01 21:28:30.192 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:28:30.192 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:28:30.192 INFO running `"docker" "create" "-v" "/tmp/crater.f45uThPFOZYz:/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 01 21:28:30.440 INFO blam! 561fb0d2bca8e85a53743c6340b7998a088696d3385a6dd0efa75a618b2b7c78
Aug 01 21:28:30.442 INFO running `"docker" "start" "-a" "561fb0d2bca8e85a53743c6340b7998a088696d3385a6dd0efa75a618b2b7c78"`
Aug 01 21:28:31.322 INFO kablam!     Checking state v0.4.1 (file:///source)
Aug 01 21:28:32.776 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:28:32.776 INFO kablam!  --> tests/main.rs:1:1
Aug 01 21:28:32.776 INFO kablam!   |
Aug 01 21:28:32.776 INFO kablam! 1 | #![feature(const_fn)]
Aug 01 21:28:32.777 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^
Aug 01 21:28:32.777 INFO kablam! 
Aug 01 21:28:32.777 INFO kablam! error: aborting due to previous error
Aug 01 21:28:32.777 INFO kablam! 
Aug 01 21:28:32.777 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:28:32.792 INFO kablam! error: Could not compile `state`.
Aug 01 21:28:32.792 INFO kablam! 
Aug 01 21:28:32.792 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 21:28:32.793 INFO kablam! su: No module specific data is present
Aug 01 21:28:33.379 INFO running `"docker" "rm" "-f" "561fb0d2bca8e85a53743c6340b7998a088696d3385a6dd0efa75a618b2b7c78"`
Aug 01 21:28:33.543 INFO blam! 561fb0d2bca8e85a53743c6340b7998a088696d3385a6dd0efa75a618b2b7c78