Aug 11 08:37:25.546 INFO checking microbit-0.5.4 against try#a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195+tmplazy for libc-1
Aug 11 08:37:25.546 INFO running: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 08:37:25.546 INFO creating container for: cargo +a77dfcc79fe3e7e1a10ae4dccfd4b2e5e0e49195-alt check --frozen --all --all-targets
Aug 11 08:37:25.546 INFO running `"docker" "create" "-v" "/tmp/crater.BYL2oFjs9NQb:/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 08:37:25.838 INFO blam! b4a5c08a1fac091949c8775299884c011e13b799c076336e76dd8e490823cbbe
Aug 11 08:37:25.840 INFO running `"docker" "start" "-a" "b4a5c08a1fac091949c8775299884c011e13b799c076336e76dd8e490823cbbe"`
Aug 11 08:37:26.797 INFO kablam!     Checking bare-metal v0.2.1
Aug 11 08:37:26.799 INFO kablam!     Checking r0 v0.2.2
Aug 11 08:37:26.833 INFO kablam!    Compiling nrf51 v0.5.0
Aug 11 08:37:26.833 INFO kablam!     Checking nb v0.1.1
Aug 11 08:37:26.833 INFO kablam!     Checking panic-abort v0.2.0
Aug 11 08:37:26.833 INFO kablam!     Checking dcf77 v0.1.0
Aug 11 08:37:26.833 INFO kablam!     Checking numtoa v0.0.7
Aug 11 08:37:26.833 INFO kablam!    Compiling cortex-m-rt v0.5.1
Aug 11 08:37:27.225 INFO kablam!    Compiling cortex-m-semihosting v0.3.0
Aug 11 08:37:27.361 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 11 08:37:27.361 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.2.1/src/lib.rs:7:23
Aug 11 08:37:27.361 INFO kablam!   |
Aug 11 08:37:27.361 INFO kablam! 7 |     feature(const_fn, const_unsafe_cell_new)
Aug 11 08:37:27.361 INFO kablam!   |                       ^^^^^^^^^^^^^^^^^^^^^
Aug 11 08:37:27.361 INFO kablam! 
Aug 11 08:37:27.370 INFO kablam! error: aborting due to previous error
Aug 11 08:37:27.370 INFO kablam! 
Aug 11 08:37:27.371 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 11 08:37:27.387 INFO kablam! error: Could not compile `bare-metal`.
Aug 11 08:37:27.387 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 11 08:37:29.310 INFO kablam! error: build failed
Aug 11 08:37:29.312 INFO kablam! su: No module specific data is present
Aug 11 08:37:29.893 INFO running `"docker" "rm" "-f" "b4a5c08a1fac091949c8775299884c011e13b799c076336e76dd8e490823cbbe"`
Aug 11 08:37:30.102 INFO blam! b4a5c08a1fac091949c8775299884c011e13b799c076336e76dd8e490823cbbe