Aug 11 15:37:33.953 INFO checking efm32gg-stk3700-0.1.0 against try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy for libc-1
Aug 11 15:37:33.953 INFO running: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 15:37:33.953 INFO creating container for: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 15:37:33.953 INFO running `"docker" "create" "-v" "/tmp/crater.ACTrd3QYr8IB:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/libc-1/worker-1/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 15:37:34.203 INFO blam! 82b14e2ddb31bf6e80ada56f2af682c3aa3523807efaace6806e001d7f0446fd
Aug 11 15:37:34.204 INFO running `"docker" "start" "-a" "82b14e2ddb31bf6e80ada56f2af682c3aa3523807efaace6806e001d7f0446fd"`
Aug 11 15:37:35.481 INFO kablam!     Checking bare-metal v0.1.2
Aug 11 15:37:35.481 INFO kablam!    Compiling cortex-m-semihosting v0.3.0
Aug 11 15:37:35.481 INFO kablam!    Compiling cortex-m-rt v0.5.1
Aug 11 15:37:36.117 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 15:37:36.117 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.2/src/lib.rs:5:53
Aug 11 15:37:36.117 INFO kablam!   |
Aug 11 15:37:36.117 INFO kablam! 5 | #![cfg_attr(feature = "const-fn", feature(const_fn, const_unsafe_cell_new))]
Aug 11 15:37:36.117 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Aug 11 15:37:36.117 INFO kablam! 
Aug 11 15:37:36.119 INFO kablam! error: aborting due to previous error
Aug 11 15:37:36.119 INFO kablam! 
Aug 11 15:37:36.119 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 15:37:36.145 INFO kablam! error: Could not compile `bare-metal`.
Aug 11 15:37:36.145 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 15:37:38.659 INFO kablam! error: build failed
Aug 11 15:37:38.661 INFO kablam! su: No module specific data is present
Aug 11 15:37:40.234 INFO running `"docker" "rm" "-f" "82b14e2ddb31bf6e80ada56f2af682c3aa3523807efaace6806e001d7f0446fd"`
Aug 11 15:37:40.463 INFO blam! 82b14e2ddb31bf6e80ada56f2af682c3aa3523807efaace6806e001d7f0446fd