Aug 01 23:02:48.879 INFO checking sam-0.2.0 against 1.27.2 for lazy_static-1
Aug 01 23:02:48.879 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 23:02:48.879 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 23:02:48.879 INFO running `"docker" "create" "-v" "/tmp/crater.VXByHloAnCUZ:/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 01 23:02:49.224 INFO blam! c14adc9d53ab436bd138e0c8af3182b4db1b81258ebfd1981b2f843b3f4adb41
Aug 01 23:02:49.226 INFO running `"docker" "start" "-a" "c14adc9d53ab436bd138e0c8af3182b4db1b81258ebfd1981b2f843b3f4adb41"`
Aug 01 23:02:50.344 INFO kablam!     Checking sam v0.2.0 (file:///source)
Aug 01 23:02:51.313 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 23:02:51.313 INFO kablam!  --> tests/tests.rs:1:1
Aug 01 23:02:51.313 INFO kablam!   |
Aug 01 23:02:51.313 INFO kablam! 1 | #![feature(test)]
Aug 01 23:02:51.313 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 23:02:51.313 INFO kablam! 
Aug 01 23:02:51.313 INFO kablam! error: aborting due to previous error
Aug 01 23:02:51.313 INFO kablam! 
Aug 01 23:02:51.314 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 23:02:51.321 INFO kablam! error: Could not compile `sam`.
Aug 01 23:02:51.322 INFO kablam! 
Aug 01 23:02:51.322 INFO kablam! To learn more, run the command again with --verbose.
Aug 01 23:02:51.323 INFO kablam! su: No module specific data is present
Aug 01 23:02:52.290 INFO running `"docker" "rm" "-f" "c14adc9d53ab436bd138e0c8af3182b4db1b81258ebfd1981b2f843b3f4adb41"`
Aug 01 23:02:52.465 INFO blam! c14adc9d53ab436bd138e0c8af3182b4db1b81258ebfd1981b2f843b3f4adb41