Aug 01 21:37:05.410 INFO checking splay_tree-0.2.10 against 1.27.2+tmplazy for lazy_static-1
Aug 01 21:37:05.410 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:37:05.410 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 21:37:05.410 INFO running `"docker" "create" "-v" "/tmp/crater.OMvkRV5zT9Kf:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2+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 01 21:37:05.571 INFO blam! a2c7937b84d2f9d59fe350139aaff321dd69dded0062c8321e64c8aa655a0e90
Aug 01 21:37:05.583 INFO running `"docker" "start" "-a" "a2c7937b84d2f9d59fe350139aaff321dd69dded0062c8321e64c8aa655a0e90"`
Aug 01 21:37:07.750 INFO kablam!     Checking splay_tree v0.2.10 (file:///source)
Aug 01 21:37:09.322 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 21:37:09.324 INFO kablam!  --> benches/bench.rs:1:1
Aug 01 21:37:09.324 INFO kablam!   |
Aug 01 21:37:09.324 INFO kablam! 1 | #![feature(test)]
Aug 01 21:37:09.324 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 21:37:09.324 INFO kablam! 
Aug 01 21:37:09.324 INFO kablam! error: aborting due to previous error
Aug 01 21:37:09.324 INFO kablam! 
Aug 01 21:37:09.324 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 21:37:09.331 INFO kablam! error: Could not compile `splay_tree`.
Aug 01 21:37:09.332 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 21:37:10.877 INFO kablam! error: build failed
Aug 01 21:37:10.879 INFO kablam! su: No module specific data is present
Aug 01 21:37:11.384 INFO running `"docker" "rm" "-f" "a2c7937b84d2f9d59fe350139aaff321dd69dded0062c8321e64c8aa655a0e90"`
Aug 01 21:37:11.531 INFO blam! a2c7937b84d2f9d59fe350139aaff321dd69dded0062c8321e64c8aa655a0e90