Aug 30 00:51:27.344 INFO checking tm4c123x-0.4.0 against master#ede55518431154bc761f7b2438cce9078c162700 for pr-53707
Aug 30 00:51:27.344 INFO running: cargo +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets
Aug 30 00:51:27.344 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53707/master#ede55518431154bc761f7b2438cce9078c162700:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-2/master#ede55518431154bc761f7b2438cce9078c162700:/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=500" "-e" "CMD=cargo +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 00:51:27.543 INFO blam! 71d77bbc1e0efb53d20b77e3765416452dd2225ea23851a657f01e5d60b83b2a
Aug 30 00:51:27.545 INFO running `"docker" "start" "-a" "71d77bbc1e0efb53d20b77e3765416452dd2225ea23851a657f01e5d60b83b2a"`
Aug 30 00:51:28.264 INFO kablam!    Compiling cortex-m v0.2.12
Aug 30 00:51:28.264 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Aug 30 00:51:29.336 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 30 00:51:29.336 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Aug 30 00:51:29.336 INFO kablam!    |
Aug 30 00:51:29.336 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Aug 30 00:51:29.336 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Aug 30 00:51:29.336 INFO kablam! 
Aug 30 00:51:29.352 INFO kablam! error: aborting due to previous error
Aug 30 00:51:29.352 INFO kablam! 
Aug 30 00:51:29.352 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 30 00:51:29.358 INFO kablam! error: Could not compile `cortex-m`.
Aug 30 00:51:29.358 INFO kablam! 
Aug 30 00:51:29.358 INFO kablam! To learn more, run the command again with --verbose.
Aug 30 00:51:29.359 INFO kablam! su: No module specific data is present
Aug 30 00:51:29.849 INFO running `"docker" "rm" "-f" "71d77bbc1e0efb53d20b77e3765416452dd2225ea23851a657f01e5d60b83b2a"`
Aug 30 00:51:29.976 INFO blam! 71d77bbc1e0efb53d20b77e3765416452dd2225ea23851a657f01e5d60b83b2a