Aug 02 06:22:50.282 INFO checking jack-client-0.1.2 against 1.27.2 for lazy_static-1
Aug 02 06:22:50.282 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:22:50.282 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:22:50.282 INFO running `"docker" "create" "-v" "/tmp/crater.WNsitkHA3Mc8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-5/1.27.2:/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 06:22:50.608 INFO blam! c37cfa05ff6055e1bababd6568e7a4a227371f40f0a4bd83f2052025ca5b638e
Aug 02 06:22:50.610 INFO running `"docker" "start" "-a" "c37cfa05ff6055e1bababd6568e7a4a227371f40f0a4bd83f2052025ca5b638e"`
Aug 02 06:22:51.657 INFO kablam!     Checking jack-sys v0.1.5
Aug 02 06:22:52.288 INFO kablam!     Checking jack-client v0.1.2 (file:///source)
Aug 02 06:22:52.895 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:22:52.895 INFO kablam!  --> src/lib.rs:1:1
Aug 02 06:22:52.895 INFO kablam!   |
Aug 02 06:22:52.895 INFO kablam! 1 | #![feature(custom_derive)]
Aug 02 06:22:52.896 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 06:22:52.896 INFO kablam! 
Aug 02 06:22:52.897 INFO kablam! error: aborting due to previous error
Aug 02 06:22:52.897 INFO kablam! 
Aug 02 06:22:52.897 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:22:52.909 INFO kablam! error: Could not compile `jack-client`.
Aug 02 06:22:52.909 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 06:22:52.927 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:22:52.927 INFO kablam!  --> src/lib.rs:1:1
Aug 02 06:22:52.927 INFO kablam!   |
Aug 02 06:22:52.927 INFO kablam! 1 | #![feature(custom_derive)]
Aug 02 06:22:52.927 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 06:22:52.927 INFO kablam! 
Aug 02 06:22:52.929 INFO kablam! error: aborting due to previous error
Aug 02 06:22:52.929 INFO kablam! 
Aug 02 06:22:52.930 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:22:52.938 INFO kablam! error: Could not compile `jack-client`.
Aug 02 06:22:52.938 INFO kablam! 
Aug 02 06:22:52.938 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 06:22:52.939 INFO kablam! su: No module specific data is present
Aug 02 06:22:53.450 INFO running `"docker" "rm" "-f" "c37cfa05ff6055e1bababd6568e7a4a227371f40f0a4bd83f2052025ca5b638e"`
Aug 02 06:22:53.602 INFO blam! c37cfa05ff6055e1bababd6568e7a4a227371f40f0a4bd83f2052025ca5b638e