Aug 02 13:32:46.347 INFO checking calendar_queue-0.0.1 against 1.27.2+tmplazy for lazy_static-1
Aug 02 13:32:46.347 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 13:32:46.347 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 13:32:46.347 INFO running `"docker" "create" "-v" "/tmp/crater.NbwLpDxAdzMd:/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 02 13:32:46.506 INFO blam! 51f1699f4673c942901820e2f0e76d43881f6e80da040406ac173c507e6a4792
Aug 02 13:32:46.510 INFO running `"docker" "start" "-a" "51f1699f4673c942901820e2f0e76d43881f6e80da040406ac173c507e6a4792"`
Aug 02 13:32:48.060 INFO kablam!     Checking calendar_queue v0.0.1 (file:///source)
Aug 02 13:32:49.396 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 13:32:49.396 INFO kablam!  --> benches/lib.rs:1:1
Aug 02 13:32:49.396 INFO kablam!   |
Aug 02 13:32:49.396 INFO kablam! 1 | #![feature(test)]
Aug 02 13:32:49.396 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 13:32:49.396 INFO kablam! 
Aug 02 13:32:49.397 INFO kablam! error: aborting due to previous error
Aug 02 13:32:49.397 INFO kablam! 
Aug 02 13:32:49.397 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 13:32:49.404 INFO kablam! error: Could not compile `calendar_queue`.
Aug 02 13:32:49.404 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 13:32:49.676 INFO kablam! error: build failed
Aug 02 13:32:49.678 INFO kablam! su: No module specific data is present
Aug 02 13:32:50.362 INFO running `"docker" "rm" "-f" "51f1699f4673c942901820e2f0e76d43881f6e80da040406ac173c507e6a4792"`
Aug 02 13:32:50.493 INFO blam! 51f1699f4673c942901820e2f0e76d43881f6e80da040406ac173c507e6a4792