Aug 02 06:22:25.671 INFO checking jam_derive-0.0.1 against 1.27.2+tmplazy for lazy_static-1
Aug 02 06:22:25.671 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:22:25.671 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:22:25.671 INFO running `"docker" "create" "-v" "/tmp/crater.IePHcVSc5gAD:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2+tmplazy:/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 06:22:25.851 INFO blam! 9e621d99a5c8b758231b7ef20b76ce0a39586005d0c45d664b07d4d6cdc64a9a
Aug 02 06:22:25.853 INFO running `"docker" "start" "-a" "9e621d99a5c8b758231b7ef20b76ce0a39586005d0c45d664b07d4d6cdc64a9a"`
Aug 02 06:22:26.689 INFO kablam!     Checking jam_derive v0.0.1 (file:///source)
Aug 02 06:22:28.381 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:22:28.381 INFO kablam!   --> src/lib.rs:34:1
Aug 02 06:22:28.381 INFO kablam!    |
Aug 02 06:22:28.381 INFO kablam! 34 | #![feature(proc_macro, proc_macro_lib)]
Aug 02 06:22:28.381 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 06:22:28.382 INFO kablam! 
Aug 02 06:22:28.382 INFO kablam! error: aborting due to previous error
Aug 02 06:22:28.382 INFO kablam! 
Aug 02 06:22:28.382 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:22:28.397 INFO kablam! error: Could not compile `jam_derive`.
Aug 02 06:22:28.397 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 06:22:28.661 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:22:28.661 INFO kablam!   --> src/lib.rs:34:1
Aug 02 06:22:28.661 INFO kablam!    |
Aug 02 06:22:28.661 INFO kablam! 34 | #![feature(proc_macro, proc_macro_lib)]
Aug 02 06:22:28.661 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 06:22:28.661 INFO kablam! 
Aug 02 06:22:28.661 INFO kablam! error: aborting due to previous error
Aug 02 06:22:28.662 INFO kablam! 
Aug 02 06:22:28.662 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:22:28.680 INFO kablam! error: Could not compile `jam_derive`.
Aug 02 06:22:28.680 INFO kablam! 
Aug 02 06:22:28.680 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 06:22:28.690 INFO kablam! su: No module specific data is present
Aug 02 06:22:29.503 INFO running `"docker" "rm" "-f" "9e621d99a5c8b758231b7ef20b76ce0a39586005d0c45d664b07d4d6cdc64a9a"`
Aug 02 06:22:29.657 INFO blam! 9e621d99a5c8b758231b7ef20b76ce0a39586005d0c45d664b07d4d6cdc64a9a