Aug 01 18:30:00.113 INFO checking xen-0.0.0-pre against 1.27.2 for lazy_static-1
Aug 01 18:30:00.113 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 18:30:00.113 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 18:30:00.114 INFO running `"docker" "create" "-v" "/tmp/crater.2jo2r4dfKePh:/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 01 18:30:00.431 INFO blam! 4e6ca712152181351c85ded6c43019d3b537879a35a8aa77815c6139cc75c508
Aug 01 18:30:00.433 INFO running `"docker" "start" "-a" "4e6ca712152181351c85ded6c43019d3b537879a35a8aa77815c6139cc75c508"`
Aug 01 18:30:01.665 INFO kablam!     Checking xen-sys v0.0.0-pre
Aug 01 18:30:01.795 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 18:30:01.795 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/xen-sys-0.0.0-pre/src/lib.rs:11:1
Aug 01 18:30:01.795 INFO kablam!    |
Aug 01 18:30:01.795 INFO kablam! 11 | #![feature(asm)]
Aug 01 18:30:01.795 INFO kablam!    | ^^^^^^^^^^^^^^^^
Aug 01 18:30:01.795 INFO kablam! 
Aug 01 18:30:01.796 INFO kablam! error: aborting due to previous error
Aug 01 18:30:01.796 INFO kablam! 
Aug 01 18:30:01.796 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 18:30:01.803 INFO kablam! error: Could not compile `xen-sys`.
Aug 01 18:30:01.803 INFO kablam! 
Aug 01 18:30:01.803 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 18:30:01.803 INFO kablam! su: No module specific data is present
Aug 01 18:30:02.322 INFO running `"docker" "rm" "-f" "4e6ca712152181351c85ded6c43019d3b537879a35a8aa77815c6139cc75c508"`
Aug 01 18:30:02.514 INFO blam! 4e6ca712152181351c85ded6c43019d3b537879a35a8aa77815c6139cc75c508