Aug 01 21:58:18.072 INFO checking slug-0.1.3 against 1.27.2+tmplazy for lazy_static-1
Aug 01 21:58:18.072 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:58:18.072 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:58:18.072 INFO running `"docker" "create" "-v" "/tmp/crater.I4gTtKAACTcI:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2+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 01 21:58:18.299 INFO blam! 4fb0ed18e0de1febcc16e14280057afa516d1f95d85ec1bc2abd6f1582d46eae
Aug 01 21:58:18.301 INFO running `"docker" "start" "-a" "4fb0ed18e0de1febcc16e14280057afa516d1f95d85ec1bc2abd6f1582d46eae"`
Aug 01 21:58:19.141 INFO kablam!     Checking slug v0.1.3 (file:///source)
Aug 01 21:58:20.419 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:58:20.419 INFO kablam!  --> benches/main.rs:1:1
Aug 01 21:58:20.419 INFO kablam!   |
Aug 01 21:58:20.419 INFO kablam! 1 | #![feature(test)]
Aug 01 21:58:20.419 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 21:58:20.419 INFO kablam! 
Aug 01 21:58:20.420 INFO kablam! error: aborting due to previous error
Aug 01 21:58:20.420 INFO kablam! 
Aug 01 21:58:20.420 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:58:20.433 INFO kablam! error: Could not compile `slug`.
Aug 01 21:58:20.433 INFO kablam! 
Aug 01 21:58:20.433 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 21:58:20.434 INFO kablam! su: No module specific data is present
Aug 01 21:58:20.996 INFO running `"docker" "rm" "-f" "4fb0ed18e0de1febcc16e14280057afa516d1f95d85ec1bc2abd6f1582d46eae"`
Aug 01 21:58:21.154 INFO blam! 4fb0ed18e0de1febcc16e14280057afa516d1f95d85ec1bc2abd6f1582d46eae