Aug 02 04:27:39.517 INFO checking mersenne_twister-1.1.1 against 1.27.2 for lazy_static-1
Aug 02 04:27:39.517 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:27:39.517 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:27:39.517 INFO running `"docker" "create" "-v" "/tmp/crater.tmNJOeqvDPcD:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2:/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 04:27:39.742 INFO blam! 084012587ebb614ee442af7704094cb0b9f241cc42b5539a15c6d4f359698c32
Aug 02 04:27:39.744 INFO running `"docker" "start" "-a" "084012587ebb614ee442af7704094cb0b9f241cc42b5539a15c6d4f359698c32"`
Aug 02 04:27:41.260 INFO kablam!     Checking mersenne_twister v1.1.1 (file:///source)
Aug 02 04:27:43.303 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 04:27:43.303 INFO kablam!  --> benches/benchmarks.rs:1:1
Aug 02 04:27:43.303 INFO kablam!   |
Aug 02 04:27:43.303 INFO kablam! 1 | #![feature(test)]
Aug 02 04:27:43.303 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 04:27:43.303 INFO kablam! 
Aug 02 04:27:43.304 INFO kablam! error: aborting due to previous error
Aug 02 04:27:43.304 INFO kablam! 
Aug 02 04:27:43.304 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 04:27:43.311 INFO kablam! error: Could not compile `mersenne_twister`.
Aug 02 04:27:43.311 INFO kablam! 
Aug 02 04:27:43.311 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 04:27:43.313 INFO kablam! su: No module specific data is present
Aug 02 04:27:44.464 INFO running `"docker" "rm" "-f" "084012587ebb614ee442af7704094cb0b9f241cc42b5539a15c6d4f359698c32"`
Aug 02 04:27:44.655 INFO blam! 084012587ebb614ee442af7704094cb0b9f241cc42b5539a15c6d4f359698c32