Aug 02 03:48:31.416 INFO checking nav-types-0.3.0 against 1.27.2 for lazy_static-1
Aug 02 03:48:31.416 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:48:31.416 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:48:31.416 INFO running `"docker" "create" "-v" "/tmp/crater.ONBLQmxk0vFK:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2:/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 03:48:31.703 INFO blam! 1e0ef6a0c0a33bd8a5d55972395e1943e2640858ae76d48cc4079eeaae96a578
Aug 02 03:48:31.705 INFO running `"docker" "start" "-a" "1e0ef6a0c0a33bd8a5d55972395e1943e2640858ae76d48cc4079eeaae96a578"`
Aug 02 03:48:33.004 INFO kablam!     Checking nav-types v0.3.0 (file:///source)
Aug 02 03:48:39.506 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:48:39.506 INFO kablam!  --> benches/lib.rs:1:1
Aug 02 03:48:39.507 INFO kablam!   |
Aug 02 03:48:39.507 INFO kablam! 1 | #![feature(test)]
Aug 02 03:48:39.507 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 03:48:39.507 INFO kablam! 
Aug 02 03:48:39.507 INFO kablam! error: aborting due to previous error
Aug 02 03:48:39.507 INFO kablam! 
Aug 02 03:48:39.507 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 03:48:39.522 INFO kablam! error: Could not compile `nav-types`.
Aug 02 03:48:39.522 INFO kablam! 
Aug 02 03:48:39.522 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 03:48:39.523 INFO kablam! su: No module specific data is present
Aug 02 03:48:40.257 INFO running `"docker" "rm" "-f" "1e0ef6a0c0a33bd8a5d55972395e1943e2640858ae76d48cc4079eeaae96a578"`
Aug 02 03:48:40.516 INFO blam! 1e0ef6a0c0a33bd8a5d55972395e1943e2640858ae76d48cc4079eeaae96a578