Aug 01 19:29:19.269 INFO checking utf8-ranges-1.0.0 against 1.27.2 for lazy_static-1
Aug 01 19:29:19.269 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:29:19.269 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 19:29:19.269 INFO running `"docker" "create" "-v" "/tmp/crater.IC25f40bZFZ2:/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 01 19:29:19.488 INFO blam! 8dd65c78ce3fa8de8e58ddd25154870a99e973a1eda218f00f73294ec96429c9
Aug 01 19:29:19.498 INFO running `"docker" "start" "-a" "8dd65c78ce3fa8de8e58ddd25154870a99e973a1eda218f00f73294ec96429c9"`
Aug 01 19:29:20.564 INFO kablam!     Checking utf8-ranges v1.0.0 (file:///source)
Aug 01 19:29:22.244 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 19:29:22.244 INFO kablam!  --> benches/bench.rs:1:1
Aug 01 19:29:22.244 INFO kablam!   |
Aug 01 19:29:22.244 INFO kablam! 1 | #![feature(test)]
Aug 01 19:29:22.244 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 19:29:22.244 INFO kablam! 
Aug 01 19:29:22.244 INFO kablam! error: aborting due to previous error
Aug 01 19:29:22.244 INFO kablam! 
Aug 01 19:29:22.244 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 19:29:22.266 INFO kablam! error: Could not compile `utf8-ranges`.
Aug 01 19:29:22.267 INFO kablam! 
Aug 01 19:29:22.267 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 19:29:22.269 INFO kablam! su: No module specific data is present
Aug 01 19:29:22.727 INFO running `"docker" "rm" "-f" "8dd65c78ce3fa8de8e58ddd25154870a99e973a1eda218f00f73294ec96429c9"`
Aug 01 19:29:22.875 INFO blam! 8dd65c78ce3fa8de8e58ddd25154870a99e973a1eda218f00f73294ec96429c9