Sep 05 21:52:17.808 INFO checking tm4c123x-0.4.0 against master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6 for pr-53854
Sep 05 21:52:17.808 INFO running: cargo +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets
Sep 05 21:52:17.808 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-53854/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-4/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/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" "-e" "USER_ID=1000" "-e" "CMD=cargo +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 05 21:52:18.181 INFO blam! fa2fe13cfddbe5d72874c521049714767516913403e869cead934763093cd93a
Sep 05 21:52:18.194 INFO running `"docker" "start" "-a" "fa2fe13cfddbe5d72874c521049714767516913403e869cead934763093cd93a"`
Sep 05 21:52:20.692 INFO kablam! usermod: no changes
Sep 05 21:52:20.786 INFO kablam!    Compiling cortex-m v0.2.12
Sep 05 21:52:20.790 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 05 21:52:20.790 INFO kablam!     Checking aligned v0.1.2
Sep 05 21:52:20.803 INFO kablam!     Checking volatile-register v0.2.0
Sep 05 21:52:22.842 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 05 21:52:22.842 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 05 21:52:22.842 INFO kablam!    |
Sep 05 21:52:22.842 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 05 21:52:22.842 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 05 21:52:22.842 INFO kablam! 
Sep 05 21:52:22.862 INFO kablam! error: aborting due to previous error
Sep 05 21:52:22.862 INFO kablam! 
Sep 05 21:52:22.862 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 05 21:52:22.873 INFO kablam! error: Could not compile `cortex-m`.
Sep 05 21:52:22.873 INFO kablam! 
Sep 05 21:52:22.873 INFO kablam! To learn more, run the command again with --verbose.
Sep 05 21:52:22.882 INFO kablam! su: No module specific data is present
Sep 05 21:52:23.671 INFO running `"docker" "rm" "-f" "fa2fe13cfddbe5d72874c521049714767516913403e869cead934763093cd93a"`
Sep 05 21:52:24.077 INFO blam! fa2fe13cfddbe5d72874c521049714767516913403e869cead934763093cd93a