Aug 02 06:59:08.289 INFO checking id-set-0.2.2 against 1.27.2+tmplazy for lazy_static-1
Aug 02 06:59:08.289 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:59:08.289 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 06:59:08.290 INFO running `"docker" "create" "-v" "/tmp/crater.KcCz7296u0E1:/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 06:59:08.506 INFO blam! ab84eab6565722e368c5cc69ee1ce9401e3be3b90e04059398800ddd77733b88
Aug 02 06:59:08.509 INFO running `"docker" "start" "-a" "ab84eab6565722e368c5cc69ee1ce9401e3be3b90e04059398800ddd77733b88"`
Aug 02 06:59:10.188 INFO kablam!     Checking id-set v0.2.2 (file:///source)
Aug 02 06:59:11.887 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 06:59:11.887 INFO kablam!  --> benches/benches.rs:1:1
Aug 02 06:59:11.887 INFO kablam!   |
Aug 02 06:59:11.887 INFO kablam! 1 | #![feature(test)]
Aug 02 06:59:11.887 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 06:59:11.887 INFO kablam! 
Aug 02 06:59:11.887 INFO kablam! error: aborting due to previous error
Aug 02 06:59:11.887 INFO kablam! 
Aug 02 06:59:11.887 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 06:59:11.894 INFO kablam! error: Could not compile `id-set`.
Aug 02 06:59:11.894 INFO kablam! 
Aug 02 06:59:11.894 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 06:59:11.897 INFO kablam! su: No module specific data is present
Aug 02 06:59:13.974 INFO running `"docker" "rm" "-f" "ab84eab6565722e368c5cc69ee1ce9401e3be3b90e04059398800ddd77733b88"`
Aug 02 06:59:14.110 INFO blam! ab84eab6565722e368c5cc69ee1ce9401e3be3b90e04059398800ddd77733b88