Aug 02 04:27:52.916 INFO checking merkle_test-0.1.1 against 1.27.2 for lazy_static-1
Aug 02 04:27:52.916 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:27:52.916 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:27:52.916 INFO running `"docker" "create" "-v" "/tmp/crater.uYiKHdJ6CwZE:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2:/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 04:27:53.171 INFO blam! 4ed00b85d886129f6a966eb196d672358407c40df79b1b9728a62a73cb3a1e9f
Aug 02 04:27:53.173 INFO running `"docker" "start" "-a" "4ed00b85d886129f6a966eb196d672358407c40df79b1b9728a62a73cb3a1e9f"`
Aug 02 04:27:54.404 INFO kablam!     Checking merkle_test v0.1.1 (file:///source)
Aug 02 04:27:56.586 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 04:27:56.587 INFO kablam!  --> benches/main.rs:1:1
Aug 02 04:27:56.587 INFO kablam!   |
Aug 02 04:27:56.587 INFO kablam! 1 | #![feature(test)]
Aug 02 04:27:56.587 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 04:27:56.587 INFO kablam! 
Aug 02 04:27:56.587 INFO kablam! error: aborting due to previous error
Aug 02 04:27:56.587 INFO kablam! 
Aug 02 04:27:56.587 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 04:27:56.595 INFO kablam! error: Could not compile `merkle_test`.
Aug 02 04:27:56.595 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 04:27:56.810 INFO kablam! error: build failed
Aug 02 04:27:56.812 INFO kablam! su: No module specific data is present
Aug 02 04:27:57.503 INFO running `"docker" "rm" "-f" "4ed00b85d886129f6a966eb196d672358407c40df79b1b9728a62a73cb3a1e9f"`
Aug 02 04:27:57.691 INFO blam! 4ed00b85d886129f6a966eb196d672358407c40df79b1b9728a62a73cb3a1e9f