Aug 11 02:46:54.622 INFO checking samd21g18a-0.2.0 against master#f6d43ed84207c7e58f363f46e5a438ff40f2b311 for libc-1
Aug 11 02:46:54.622 INFO running: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 02:46:54.622 INFO creating container for: cargo +f6d43ed84207c7e58f363f46e5a438ff40f2b311-alt check --frozen --all --all-targets
Aug 11 02:46:54.622 INFO running `"docker" "create" "-v" "/tmp/crater.uhBvdlSSvhhY:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-2/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 02:46:54.884 INFO blam! 75c50f5899430333536dd995504edcc063e4f08efa41f2f9a370a09d63f3fd77
Aug 11 02:46:54.886 INFO running `"docker" "start" "-a" "75c50f5899430333536dd995504edcc063e4f08efa41f2f9a370a09d63f3fd77"`
Aug 11 02:46:56.547 INFO kablam!    Compiling cortex-m v0.3.1
Aug 11 02:46:56.555 INFO kablam!     Checking aligned v0.1.2
Aug 11 02:46:56.557 INFO kablam!     Checking bare-metal v0.1.2
Aug 11 02:46:56.825 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 02:46:56.825 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 11 02:46:56.829 INFO kablam!   |
Aug 11 02:46:56.829 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 11 02:46:56.829 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 02:46:56.829 INFO kablam! 
Aug 11 02:46:56.829 INFO kablam! error: aborting due to previous error
Aug 11 02:46:56.829 INFO kablam! 
Aug 11 02:46:56.829 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 02:46:56.831 INFO kablam! error: Could not compile `bare-metal`.
Aug 11 02:46:56.832 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 02:46:58.706 INFO kablam! error: build failed
Aug 11 02:46:58.710 INFO kablam! su: No module specific data is present
Aug 11 02:46:59.574 INFO running `"docker" "rm" "-f" "75c50f5899430333536dd995504edcc063e4f08efa41f2f9a370a09d63f3fd77"`
Aug 11 02:46:59.780 INFO blam! 75c50f5899430333536dd995504edcc063e4f08efa41f2f9a370a09d63f3fd77