Aug 02 06:40:29.974 INFO checking int_hash-0.1.1 against 1.27.2+tmplazy for lazy_static-1
Aug 02 06:40:29.974 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:40:29.975 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:40:29.975 INFO running `"docker" "create" "-v" "/tmp/crater.XA866s3kytkf:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2+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 06:40:30.184 INFO blam! 2d564b1aab158500dde0bd155b75e6a46b559b8d8cafb545f71e3a69bef91421
Aug 02 06:40:30.185 INFO running `"docker" "start" "-a" "2d564b1aab158500dde0bd155b75e6a46b559b8d8cafb545f71e3a69bef91421"`
Aug 02 06:40:31.466 INFO kablam!     Checking int_hash v0.1.1 (file:///source)
Aug 02 06:40:32.757 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:40:32.757 INFO kablam!  --> benches/map.rs:1:1
Aug 02 06:40:32.757 INFO kablam!   |
Aug 02 06:40:32.757 INFO kablam! 1 | #![feature(test)]
Aug 02 06:40:32.757 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 06:40:32.757 INFO kablam! 
Aug 02 06:40:32.764 INFO kablam! error: aborting due to previous error
Aug 02 06:40:32.765 INFO kablam! 
Aug 02 06:40:32.765 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:40:32.775 INFO kablam! error: Could not compile `int_hash`.
Aug 02 06:40:32.775 INFO kablam! 
Aug 02 06:40:32.775 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 06:40:32.777 INFO kablam! su: No module specific data is present
Aug 02 06:40:33.592 INFO running `"docker" "rm" "-f" "2d564b1aab158500dde0bd155b75e6a46b559b8d8cafb545f71e3a69bef91421"`
Aug 02 06:40:33.744 INFO blam! 2d564b1aab158500dde0bd155b75e6a46b559b8d8cafb545f71e3a69bef91421