Aug 02 02:39:42.913 INFO checking parser-combinators-0.7.1 against 1.27.2+tmplazy for lazy_static-1
Aug 02 02:39:42.913 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 02:39:42.913 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 02:39:42.913 INFO running `"docker" "create" "-v" "/tmp/crater.8zJ3yjjwzSdX:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2+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 02:39:43.128 INFO blam! 17d6328d12a55cce2c51acf61326a115839cb572fb4129d4771410ba748bf1c0
Aug 02 02:39:43.131 INFO running `"docker" "start" "-a" "17d6328d12a55cce2c51acf61326a115839cb572fb4129d4771410ba748bf1c0"`
Aug 02 02:39:44.562 INFO kablam!     Checking parser-combinators v0.7.1 (file:///source)
Aug 02 02:39:50.983 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 02:39:50.983 INFO kablam!  --> benches/json.rs:1:1
Aug 02 02:39:50.983 INFO kablam!   |
Aug 02 02:39:50.983 INFO kablam! 1 | #![feature(test)]
Aug 02 02:39:50.983 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 02:39:50.983 INFO kablam! 
Aug 02 02:39:50.983 INFO kablam! error: aborting due to previous error
Aug 02 02:39:50.983 INFO kablam! 
Aug 02 02:39:50.983 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 02:39:50.999 INFO kablam! error: Could not compile `parser-combinators`.
Aug 02 02:39:51.000 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 02:39:51.792 INFO kablam! error: build failed
Aug 02 02:39:51.794 INFO kablam! su: No module specific data is present
Aug 02 02:39:52.414 INFO running `"docker" "rm" "-f" "17d6328d12a55cce2c51acf61326a115839cb572fb4129d4771410ba748bf1c0"`
Aug 02 02:39:52.587 INFO blam! 17d6328d12a55cce2c51acf61326a115839cb572fb4129d4771410ba748bf1c0