Aug 02 12:31:17.184 INFO checking conduit-mime-types-0.7.3 against 1.27.2 for lazy_static-1
Aug 02 12:31:17.184 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:31:17.184 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:31:17.184 INFO running `"docker" "create" "-v" "/tmp/crater.CBI3hojea0no:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-7/1.27.2:/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 12:31:17.326 INFO blam! 09ff72ac492d730e493025428fbd92d37a0127133a0cda05c81842af7998e2d9
Aug 02 12:31:17.327 INFO running `"docker" "start" "-a" "09ff72ac492d730e493025428fbd92d37a0127133a0cda05c81842af7998e2d9"`
Aug 02 12:31:18.588 INFO kablam!     Checking conduit-mime-types v0.7.3 (file:///source)
Aug 02 12:31:18.991 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:31:18.991 INFO kablam!  --> src/lib.rs:1:19
Aug 02 12:31:18.991 INFO kablam!   |
Aug 02 12:31:18.991 INFO kablam! 1 | #![cfg_attr(test, feature(test))]
Aug 02 12:31:18.991 INFO kablam!   |                   ^^^^^^^^^^^^^^
Aug 02 12:31:18.991 INFO kablam! 
Aug 02 12:31:18.991 INFO kablam! error: aborting due to previous error
Aug 02 12:31:18.991 INFO kablam! 
Aug 02 12:31:18.992 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:31:18.999 INFO kablam! error: Could not compile `conduit-mime-types`.
Aug 02 12:31:18.999 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 12:31:19.045 INFO kablam! error: build failed
Aug 02 12:31:19.047 INFO kablam! su: No module specific data is present
Aug 02 12:31:19.738 INFO running `"docker" "rm" "-f" "09ff72ac492d730e493025428fbd92d37a0127133a0cda05c81842af7998e2d9"`
Aug 02 12:31:19.822 INFO blam! 09ff72ac492d730e493025428fbd92d37a0127133a0cda05c81842af7998e2d9