Aug 11 20:19:17.665 INFO checking alloc-cortex-m-0.3.5 against try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy for libc-1
Aug 11 20:19:17.665 INFO running: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 20:19:17.665 INFO creating container for: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 20:19:17.665 INFO running `"docker" "create" "-v" "/tmp/crater.Ch07VdpfPbeh:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-2/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 20:19:17.896 INFO blam! 034dcef8ba8a3b0f7e8d339e3965fcd1d3ef8696cda00598befaebd334d9d63a
Aug 11 20:19:17.897 INFO running `"docker" "start" "-a" "034dcef8ba8a3b0f7e8d339e3965fcd1d3ef8696cda00598befaebd334d9d63a"`
Aug 11 20:19:19.026 INFO kablam!     Checking volatile-register v0.1.2
Aug 11 20:19:19.028 INFO kablam!     Checking linked_list_allocator v0.6.3
Aug 11 20:19:19.183 INFO kablam!     Checking cortex-m v0.1.7
Aug 11 20:19:19.499 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 20:19:19.499 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.1.7/src/lib.rs:16:12
Aug 11 20:19:19.499 INFO kablam!    |
Aug 11 20:19:19.499 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Aug 11 20:19:19.499 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Aug 11 20:19:19.499 INFO kablam! 
Aug 11 20:19:19.515 INFO kablam! error: aborting due to previous error
Aug 11 20:19:19.515 INFO kablam! 
Aug 11 20:19:19.515 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 20:19:19.522 INFO kablam! error: Could not compile `cortex-m`.
Aug 11 20:19:19.522 INFO kablam! 
Aug 11 20:19:19.522 INFO kablam! To learn more, run the command again with --verbose.
Aug 11 20:19:19.523 INFO kablam! su: No module specific data is present
Aug 11 20:19:20.073 INFO running `"docker" "rm" "-f" "034dcef8ba8a3b0f7e8d339e3965fcd1d3ef8696cda00598befaebd334d9d63a"`
Aug 11 20:19:20.190 INFO blam! 034dcef8ba8a3b0f7e8d339e3965fcd1d3ef8696cda00598befaebd334d9d63a