Aug 02 06:32:45.489 INFO checking iq_osc-3.0.0 against 1.27.2 for lazy_static-1
Aug 02 06:32:45.489 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:32:45.489 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:32:45.489 INFO running `"docker" "create" "-v" "/tmp/crater.vDvypo1u3oAd:/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 02 06:32:45.738 INFO blam! 837d7ef966e78fb9411c0f2f8c145a93ae1dc938fd053258058828cc79c54613
Aug 02 06:32:45.741 INFO running `"docker" "start" "-a" "837d7ef966e78fb9411c0f2f8c145a93ae1dc938fd053258058828cc79c54613"`
Aug 02 06:32:46.700 INFO kablam!     Checking iq_osc v3.0.0 (file:///source)
Aug 02 06:32:48.710 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:32:48.710 INFO kablam!  --> benches/bench.rs:1:1
Aug 02 06:32:48.710 INFO kablam!   |
Aug 02 06:32:48.710 INFO kablam! 1 | #![feature(test)]
Aug 02 06:32:48.710 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 06:32:48.710 INFO kablam! 
Aug 02 06:32:48.712 INFO kablam! error: aborting due to previous error
Aug 02 06:32:48.712 INFO kablam! 
Aug 02 06:32:48.712 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:32:48.720 INFO kablam! error: Could not compile `iq_osc`.
Aug 02 06:32:48.720 INFO kablam! 
Aug 02 06:32:48.720 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 06:32:48.721 INFO kablam! su: No module specific data is present
Aug 02 06:32:49.278 INFO running `"docker" "rm" "-f" "837d7ef966e78fb9411c0f2f8c145a93ae1dc938fd053258058828cc79c54613"`
Aug 02 06:32:49.443 INFO blam! 837d7ef966e78fb9411c0f2f8c145a93ae1dc938fd053258058828cc79c54613