Aug 01 19:39:31.130 INFO checking unic-char-range-0.7.0 against 1.27.2 for lazy_static-1
Aug 01 19:39:31.130 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:39:31.130 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:39:31.130 INFO running `"docker" "create" "-v" "/tmp/crater.761HKQ6UG58Z:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2:/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 19:39:31.306 INFO blam! b9e478166de6c1a371e8995e16a66a5c9067569e9ed0d4828a8a9d246744e743
Aug 01 19:39:31.307 INFO running `"docker" "start" "-a" "b9e478166de6c1a371e8995e16a66a5c9067569e9ed0d4828a8a9d246744e743"`
Aug 01 19:39:32.422 INFO kablam!     Checking unic-char-range v0.7.0 (file:///source)
Aug 01 19:39:33.787 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 19:39:33.788 INFO kablam!   --> benches/benchmarks.rs:11:1
Aug 01 19:39:33.788 INFO kablam!    |
Aug 01 19:39:33.788 INFO kablam! 11 | #![feature(test)]
Aug 01 19:39:33.788 INFO kablam!    | ^^^^^^^^^^^^^^^^^
Aug 01 19:39:33.788 INFO kablam! 
Aug 01 19:39:33.788 INFO kablam! error: aborting due to previous error
Aug 01 19:39:33.788 INFO kablam! 
Aug 01 19:39:33.788 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 19:39:33.801 INFO kablam! error: Could not compile `unic-char-range`.
Aug 01 19:39:33.802 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 19:39:33.845 INFO kablam! error: build failed
Aug 01 19:39:33.847 INFO kablam! su: No module specific data is present
Aug 01 19:39:34.438 INFO running `"docker" "rm" "-f" "b9e478166de6c1a371e8995e16a66a5c9067569e9ed0d4828a8a9d246744e743"`
Aug 01 19:39:34.595 INFO blam! b9e478166de6c1a371e8995e16a66a5c9067569e9ed0d4828a8a9d246744e743