Aug 11 07:31:19.650 INFO checking nrf52840-0.1.3 against try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy for libc-1
Aug 11 07:31:19.650 INFO running: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 07:31:19.650 INFO creating container for: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 07:31:19.650 INFO running `"docker" "create" "-v" "/tmp/crater.RNcJoOoZNYmo:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-7/try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy:/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 +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 11 07:31:19.894 INFO blam! fbe8212560cb28648a638fd83c2dd318f9ce773db73af3432ba5b6d60944f9c3
Aug 11 07:31:19.895 INFO running `"docker" "start" "-a" "fbe8212560cb28648a638fd83c2dd318f9ce773db73af3432ba5b6d60944f9c3"`
Aug 11 07:31:20.832 INFO kablam!    Compiling nrf52840 v0.1.3 (file:///source)
Aug 11 07:31:20.832 INFO kablam!     Checking bare-metal v0.1.2
Aug 11 07:31:21.084 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 07:31:21.084 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 11 07:31:21.084 INFO kablam!   |
Aug 11 07:31:21.084 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 11 07:31:21.084 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 07:31:21.091 INFO kablam! 
Aug 11 07:31:21.094 INFO kablam! error: aborting due to previous error
Aug 11 07:31:21.094 INFO kablam! 
Aug 11 07:31:21.094 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 07:31:21.101 INFO kablam! error: Could not compile `bare-metal`.
Aug 11 07:31:21.101 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 07:31:21.957 INFO kablam! error: build failed
Aug 11 07:31:21.959 INFO kablam! su: No module specific data is present
Aug 11 07:31:22.542 INFO running `"docker" "rm" "-f" "fbe8212560cb28648a638fd83c2dd318f9ce773db73af3432ba5b6d60944f9c3"`
Aug 11 07:31:22.700 INFO blam! fbe8212560cb28648a638fd83c2dd318f9ce773db73af3432ba5b6d60944f9c3