Aug 11 17:12:07.962 INFO checking cortex-m-0.4.3 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 17:12:07.962 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 17:12:07.962 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 17:12:07.962 INFO running `"docker" "create" "-v" "/tmp/crater.63iRGazVa6t3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-4/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 17:12:08.167 INFO blam! 8c4e5043f1c82c73642c91dd1a7f641063bcaeaac2799a75f0e39cb3c05ded9f
Aug 11 17:12:08.169 INFO running `"docker" "start" "-a" "8c4e5043f1c82c73642c91dd1a7f641063bcaeaac2799a75f0e39cb3c05ded9f"`
Aug 11 17:12:09.292 INFO kablam!    Compiling cortex-m v0.4.3 (file:///source)
Aug 11 17:12:09.297 INFO kablam!     Checking bare-metal v0.1.2
Aug 11 17:12:09.649 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 17:12:09.650 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 11 17:12:09.650 INFO kablam!   |
Aug 11 17:12:09.650 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 11 17:12:09.650 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 17:12:09.655 INFO kablam! 
Aug 11 17:12:09.657 INFO kablam! error: aborting due to previous error
Aug 11 17:12:09.676 INFO kablam! 
Aug 11 17:12:09.677 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 17:12:09.683 INFO kablam! error: Could not compile `bare-metal`.
Aug 11 17:12:09.684 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 17:12:10.434 INFO kablam! error: build failed
Aug 11 17:12:10.436 INFO kablam! su: No module specific data is present
Aug 11 17:12:11.027 INFO running `"docker" "rm" "-f" "8c4e5043f1c82c73642c91dd1a7f641063bcaeaac2799a75f0e39cb3c05ded9f"`
Aug 11 17:12:11.146 INFO blam! 8c4e5043f1c82c73642c91dd1a7f641063bcaeaac2799a75f0e39cb3c05ded9f