Aug 02 07:08:18.678 INFO checking http2parse-0.2.2 against 1.27.2+tmplazy for lazy_static-1
Aug 02 07:08:18.678 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 07:08:18.678 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 07:08:18.678 INFO running `"docker" "create" "-v" "/tmp/crater.3WyhT7YT7jfb:/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 07:08:18.965 INFO blam! 3e17154b4961925b4c824c335e703371ff393b0037175427ac589cd6251fe0db
Aug 02 07:08:18.968 INFO running `"docker" "start" "-a" "3e17154b4961925b4c824c335e703371ff393b0037175427ac589cd6251fe0db"`
Aug 02 07:08:20.868 INFO kablam!     Checking http2parse v0.2.2 (file:///source)
Aug 02 07:08:21.524 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 07:08:21.524 INFO kablam!  --> src/lib.rs:2:19
Aug 02 07:08:21.524 INFO kablam!   |
Aug 02 07:08:21.524 INFO kablam! 2 | #![cfg_attr(test, feature(test))]
Aug 02 07:08:21.524 INFO kablam!   |                   ^^^^^^^^^^^^^^
Aug 02 07:08:21.525 INFO kablam! 
Aug 02 07:08:21.531 INFO kablam! error: aborting due to previous error
Aug 02 07:08:21.531 INFO kablam! 
Aug 02 07:08:21.532 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 07:08:21.550 INFO kablam! error: Could not compile `http2parse`.
Aug 02 07:08:21.551 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 07:08:22.028 INFO kablam! error: build failed
Aug 02 07:08:22.029 INFO kablam! su: No module specific data is present
Aug 02 07:08:23.834 INFO running `"docker" "rm" "-f" "3e17154b4961925b4c824c335e703371ff393b0037175427ac589cd6251fe0db"`
Aug 02 07:08:23.931 INFO blam! 3e17154b4961925b4c824c335e703371ff393b0037175427ac589cd6251fe0db