Aug 11 00:55:09.836 INFO checking stm32f7x3-0.2.0 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 00:55:09.836 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 00:55:09.836 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 00:55:09.836 INFO running `"docker" "create" "-v" "/tmp/crater.VmYPV7dfHGNU:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-0/master#f6d43ed84207c7e58f363f46e5a438ff40f2b311:/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 +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 11 00:55:10.079 INFO blam! 4402ba7239478465c15b711912dc878be7a9e8fc0e651551312fe3dceee7f6d5
Aug 11 00:55:10.081 INFO running `"docker" "start" "-a" "4402ba7239478465c15b711912dc878be7a9e8fc0e651551312fe3dceee7f6d5"`
Aug 11 00:55:11.443 INFO kablam!     Checking bare-metal v0.1.2
Aug 11 00:55:11.443 INFO kablam!    Compiling cortex-m v0.4.3
Aug 11 00:55:11.626 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 00:55:11.626 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 11 00:55:11.626 INFO kablam!   |
Aug 11 00:55:11.626 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 11 00:55:11.626 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 00:55:11.626 INFO kablam! 
Aug 11 00:55:11.627 INFO kablam! error: aborting due to previous error
Aug 11 00:55:11.628 INFO kablam! 
Aug 11 00:55:11.628 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 00:55:11.635 INFO kablam! error: Could not compile `bare-metal`.
Aug 11 00:55:11.636 INFO kablam! 
Aug 11 00:55:11.636 INFO kablam! To learn more, run the command again with --verbose.
Aug 11 00:55:11.637 INFO kablam! su: No module specific data is present
Aug 11 00:55:12.284 INFO running `"docker" "rm" "-f" "4402ba7239478465c15b711912dc878be7a9e8fc0e651551312fe3dceee7f6d5"`
Aug 11 00:55:12.444 INFO blam! 4402ba7239478465c15b711912dc878be7a9e8fc0e651551312fe3dceee7f6d5