Aug 02 11:45:38.523 INFO checking debug_sat-0.4.0 against 1.27.2 for lazy_static-1
Aug 02 11:45:38.523 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 11:45:38.523 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 11:45:38.523 INFO running `"docker" "create" "-v" "/tmp/crater.r1RuOh1efHyS:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-1/1.27.2:/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 11:45:38.768 INFO blam! 7d46a7faeb80e732f3126f2c91f9ab42529039d27e98598f4c6bb9c15ddbd14d
Aug 02 11:45:38.770 INFO running `"docker" "start" "-a" "7d46a7faeb80e732f3126f2c91f9ab42529039d27e98598f4c6bb9c15ddbd14d"`
Aug 02 11:45:40.290 INFO kablam!     Checking debug_sat v0.4.0 (file:///source)
Aug 02 11:45:41.009 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 11:45:41.009 INFO kablam!    --> src/lib.rs:115:19
Aug 02 11:45:41.009 INFO kablam!     |
Aug 02 11:45:41.009 INFO kablam! 115 | #![cfg_attr(test, feature(test))]
Aug 02 11:45:41.009 INFO kablam!     |                   ^^^^^^^^^^^^^^
Aug 02 11:45:41.009 INFO kablam! 
Aug 02 11:45:41.019 INFO kablam! error: aborting due to previous error
Aug 02 11:45:41.019 INFO kablam! 
Aug 02 11:45:41.019 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 11:45:41.026 INFO kablam! error: Could not compile `debug_sat`.
Aug 02 11:45:41.027 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 11:45:41.425 INFO kablam! error: build failed
Aug 02 11:45:41.426 INFO kablam! su: No module specific data is present
Aug 02 11:45:42.229 INFO running `"docker" "rm" "-f" "7d46a7faeb80e732f3126f2c91f9ab42529039d27e98598f4c6bb9c15ddbd14d"`
Aug 02 11:45:42.384 INFO blam! 7d46a7faeb80e732f3126f2c91f9ab42529039d27e98598f4c6bb9c15ddbd14d