Aug 01 21:37:07.371 INFO checking splay_tree-0.2.10 against 1.27.2 for lazy_static-1
Aug 01 21:37:07.371 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:37:07.371 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:37:07.371 INFO running `"docker" "create" "-v" "/tmp/crater.AbxH2Ok7aUuh:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2:/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 01 21:37:07.563 INFO blam! edeb84407afa7868824250420e6694d74f095cded648d5abc5c87b76b4b84116
Aug 01 21:37:07.565 INFO running `"docker" "start" "-a" "edeb84407afa7868824250420e6694d74f095cded648d5abc5c87b76b4b84116"`
Aug 01 21:37:08.955 INFO kablam!     Checking splay_tree v0.2.10 (file:///source)
Aug 01 21:37:11.258 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:37:11.258 INFO kablam!  --> benches/bench.rs:1:1
Aug 01 21:37:11.258 INFO kablam!   |
Aug 01 21:37:11.258 INFO kablam! 1 | #![feature(test)]
Aug 01 21:37:11.258 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 21:37:11.258 INFO kablam! 
Aug 01 21:37:11.258 INFO kablam! error: aborting due to previous error
Aug 01 21:37:11.258 INFO kablam! 
Aug 01 21:37:11.258 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:37:11.267 INFO kablam! error: Could not compile `splay_tree`.
Aug 01 21:37:11.267 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:37:12.508 INFO kablam! error: build failed
Aug 01 21:37:12.509 INFO kablam! su: No module specific data is present
Aug 01 21:37:13.020 INFO running `"docker" "rm" "-f" "edeb84407afa7868824250420e6694d74f095cded648d5abc5c87b76b4b84116"`
Aug 01 21:37:13.175 INFO blam! edeb84407afa7868824250420e6694d74f095cded648d5abc5c87b76b4b84116