Aug 02 03:57:24.174 INFO checking mwmatching-0.1.1 against 1.27.2 for lazy_static-1
Aug 02 03:57:24.174 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:57:24.174 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 03:57:24.174 INFO running `"docker" "create" "-v" "/tmp/crater.LM6OZ7TzUiLU:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2:/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 03:57:24.425 INFO blam! d06b0b1f80b8a3f7d5ca554929c14a6f28097bd3b4ebe4b921c9164e485e2bce
Aug 02 03:57:24.427 INFO running `"docker" "start" "-a" "d06b0b1f80b8a3f7d5ca554929c14a6f28097bd3b4ebe4b921c9164e485e2bce"`
Aug 02 03:57:25.739 INFO kablam!     Checking mwmatching v0.1.1 (file:///source)
Aug 02 03:57:27.584 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 03:57:27.584 INFO kablam!  --> examples/largedata/main.rs:1:1
Aug 02 03:57:27.584 INFO kablam!   |
Aug 02 03:57:27.584 INFO kablam! 1 | #![feature(rustc_private)]
Aug 02 03:57:27.584 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 02 03:57:27.584 INFO kablam! 
Aug 02 03:57:27.585 INFO kablam! error: aborting due to previous error
Aug 02 03:57:27.585 INFO kablam! 
Aug 02 03:57:27.585 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 03:57:27.601 INFO kablam! error: Could not compile `mwmatching`.
Aug 02 03:57:27.601 INFO kablam! 
Aug 02 03:57:27.601 INFO kablam! To learn more, run the command again with --verbose.
Aug 02 03:57:27.602 INFO kablam! su: No module specific data is present
Aug 02 03:57:28.252 INFO running `"docker" "rm" "-f" "d06b0b1f80b8a3f7d5ca554929c14a6f28097bd3b4ebe4b921c9164e485e2bce"`
Aug 02 03:57:28.438 INFO blam! d06b0b1f80b8a3f7d5ca554929c14a6f28097bd3b4ebe4b921c9164e485e2bce