Aug 02 13:01:34.443 INFO checking chan-0.1.21 against 1.27.2+tmplazy for lazy_static-1
Aug 02 13:01:34.443 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 13:01:34.443 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 13:01:34.443 INFO running `"docker" "create" "-v" "/tmp/crater.3VFrMBOt6v9G:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2+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 13:01:34.679 INFO blam! a32cc4a59cb6ba37255594614b547f639d8df9eb045041ab9d289de262ea9eab
Aug 02 13:01:34.681 INFO running `"docker" "start" "-a" "a32cc4a59cb6ba37255594614b547f639d8df9eb045041ab9d289de262ea9eab"`
Aug 02 13:01:36.361 INFO kablam!     Checking chan v0.1.21 (file:///source)
Aug 02 13:01:41.899 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 13:01:41.899 INFO kablam!  --> benches/throughput.rs:1:1
Aug 02 13:01:41.899 INFO kablam!   |
Aug 02 13:01:41.899 INFO kablam! 1 | #![feature(test)]
Aug 02 13:01:41.899 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 13:01:41.900 INFO kablam! 
Aug 02 13:01:41.902 INFO kablam! error: aborting due to previous error
Aug 02 13:01:41.902 INFO kablam! 
Aug 02 13:01:41.902 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 13:01:41.925 INFO kablam! error: Could not compile `chan`.
Aug 02 13:01:41.925 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 13:01:43.271 INFO kablam! error: build failed
Aug 02 13:01:43.273 INFO kablam! su: No module specific data is present
Aug 02 13:01:43.895 INFO running `"docker" "rm" "-f" "a32cc4a59cb6ba37255594614b547f639d8df9eb045041ab9d289de262ea9eab"`
Aug 02 13:01:44.058 INFO blam! a32cc4a59cb6ba37255594614b547f639d8df9eb045041ab9d289de262ea9eab