Aug 02 00:28:52.610 INFO checking rlibcex-0.1.2 against 1.27.2 for lazy_static-1
Aug 02 00:28:52.610 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 00:28:52.610 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 00:28:52.610 INFO running `"docker" "create" "-v" "/tmp/crater.JzO0QBPnKili:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-3/1.27.2:/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 00:28:52.824 INFO blam! c567edcaceee3f271a9528a1bd5bbb59edfd36a86ff29dba2b8f0ca04485187b
Aug 02 00:28:52.828 INFO running `"docker" "start" "-a" "c567edcaceee3f271a9528a1bd5bbb59edfd36a86ff29dba2b8f0ca04485187b"`
Aug 02 00:28:54.189 INFO kablam!     Checking rlibcex v0.1.2 (file:///source)
Aug 02 00:28:54.712 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 00:28:54.712 INFO kablam!  --> src/lib.rs:3:19
Aug 02 00:28:54.712 INFO kablam!   |
Aug 02 00:28:54.712 INFO kablam! 3 | #![cfg_attr(test, feature(test))]
Aug 02 00:28:54.712 INFO kablam!   |                   ^^^^^^^^^^^^^^
Aug 02 00:28:54.712 INFO kablam! 
Aug 02 00:28:54.714 INFO kablam! error: aborting due to previous error
Aug 02 00:28:54.714 INFO kablam! 
Aug 02 00:28:54.714 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 00:28:54.721 INFO kablam! error: Could not compile `rlibcex`.
Aug 02 00:28:54.721 INFO kablam! 
Aug 02 00:28:54.721 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 00:28:54.722 INFO kablam! su: No module specific data is present
Aug 02 00:28:55.371 INFO running `"docker" "rm" "-f" "c567edcaceee3f271a9528a1bd5bbb59edfd36a86ff29dba2b8f0ca04485187b"`
Aug 02 00:28:55.508 INFO blam! c567edcaceee3f271a9528a1bd5bbb59edfd36a86ff29dba2b8f0ca04485187b