Aug 02 13:32:54.776 INFO checking calculate-0.1.0 against 1.27.2+tmplazy for lazy_static-1
Aug 02 13:32:54.776 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 13:32:54.776 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 13:32:54.776 INFO running `"docker" "create" "-v" "/tmp/crater.PBCQ6uWyGK5s:/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 02 13:32:55.092 INFO blam! 5335682fdbbd13b2dd5fccb74fa885acff666d452b233068eed1a6b3ccf5be87
Aug 02 13:32:55.095 INFO running `"docker" "start" "-a" "5335682fdbbd13b2dd5fccb74fa885acff666d452b233068eed1a6b3ccf5be87"`
Aug 02 13:32:56.534 INFO kablam!     Checking calculate v0.1.0 (file:///source)
Aug 02 13:32:57.133 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 13:32:57.133 INFO kablam!  --> src/lib.rs:1:19
Aug 02 13:32:57.133 INFO kablam!   |
Aug 02 13:32:57.133 INFO kablam! 1 | #![cfg_attr(test, feature(test))]
Aug 02 13:32:57.134 INFO kablam!   |                   ^^^^^^^^^^^^^^
Aug 02 13:32:57.134 INFO kablam! 
Aug 02 13:32:57.136 INFO kablam! error: aborting due to previous error
Aug 02 13:32:57.136 INFO kablam! 
Aug 02 13:32:57.137 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 13:32:57.145 INFO kablam! error: Could not compile `calculate`.
Aug 02 13:32:57.145 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 13:32:57.532 INFO kablam! error: build failed
Aug 02 13:32:57.535 INFO kablam! su: No module specific data is present
Aug 02 13:32:58.143 INFO running `"docker" "rm" "-f" "5335682fdbbd13b2dd5fccb74fa885acff666d452b233068eed1a6b3ccf5be87"`
Aug 02 13:32:58.339 INFO blam! 5335682fdbbd13b2dd5fccb74fa885acff666d452b233068eed1a6b3ccf5be87