Aug 17 08:13:11.127 INFO checking tm4c123x-0.4.0 against master#142bb27373126edf8367f526358b6c72ecf1d8df for pr-53426
Aug 17 08:13:11.127 INFO running: cargo +142bb27373126edf8367f526358b6c72ecf1d8df-alt check --frozen --all --all-targets
Aug 17 08:13:11.127 INFO creating container for: cargo +142bb27373126edf8367f526358b6c72ecf1d8df-alt check --frozen --all --all-targets
Aug 17 08:13:11.127 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-53426/master#142bb27373126edf8367f526358b6c72ecf1d8df:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53426/worker-5/master#142bb27373126edf8367f526358b6c72ecf1d8df:/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 +142bb27373126edf8367f526358b6c72ecf1d8df-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "crater"`
Aug 17 08:13:11.402 INFO blam! 918043f7a88377573ffdb9021f96d89e5b8a139a95c527811ace53fcab69f08f
Aug 17 08:13:11.404 INFO running `"docker" "start" "-a" "918043f7a88377573ffdb9021f96d89e5b8a139a95c527811ace53fcab69f08f"`
Aug 17 08:13:12.335 INFO kablam!    Compiling cortex-m v0.2.12
Aug 17 08:13:12.335 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Aug 17 08:13:14.726 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Aug 17 08:13:14.726 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Aug 17 08:13:14.726 INFO kablam!    |
Aug 17 08:13:14.726 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Aug 17 08:13:14.726 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Aug 17 08:13:14.727 INFO kablam! 
Aug 17 08:13:14.754 INFO kablam! error: aborting due to previous error
Aug 17 08:13:14.755 INFO kablam! 
Aug 17 08:13:14.755 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Aug 17 08:13:14.764 INFO kablam! error: Could not compile `cortex-m`.
Aug 17 08:13:14.765 INFO kablam! 
Aug 17 08:13:14.765 INFO kablam! To learn more, run the command again with --verbose.
Aug 17 08:13:14.767 INFO kablam! su: No module specific data is present
Aug 17 08:13:15.236 INFO running `"docker" "rm" "-f" "918043f7a88377573ffdb9021f96d89e5b8a139a95c527811ace53fcab69f08f"`
Aug 17 08:13:15.398 INFO blam! 918043f7a88377573ffdb9021f96d89e5b8a139a95c527811ace53fcab69f08f