Sep 17 15:58:44.447 INFO checking tm4c123x-0.4.0 against master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690 for pr-54033
Sep 17 15:58:44.447 INFO running: cargo +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets
Sep 17 15:58:44.448 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-54033/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-3/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/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 +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 15:58:44.919 INFO blam! 6201f9664a9f81f0031e9375ada991fda5fb78f9b8f61d788489ad3b858557ea
Sep 17 15:58:44.921 INFO running `"docker" "start" "-a" "6201f9664a9f81f0031e9375ada991fda5fb78f9b8f61d788489ad3b858557ea"`
Sep 17 15:58:46.750 INFO kablam! usermod: no changes
Sep 17 15:58:46.814 INFO kablam!    Compiling cortex-m v0.2.12
Sep 17 15:58:46.815 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 17 15:58:48.399 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 17 15:58:48.399 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 17 15:58:48.399 INFO kablam!    |
Sep 17 15:58:48.399 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 17 15:58:48.399 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 17 15:58:48.399 INFO kablam! 
Sep 17 15:58:48.415 INFO kablam! error: aborting due to previous error
Sep 17 15:58:48.415 INFO kablam! 
Sep 17 15:58:48.415 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 17 15:58:48.421 INFO kablam! error: Could not compile `cortex-m`.
Sep 17 15:58:48.421 INFO kablam! 
Sep 17 15:58:48.421 INFO kablam! To learn more, run the command again with --verbose.
Sep 17 15:58:48.422 INFO kablam! su: No module specific data is present
Sep 17 15:58:49.806 INFO running `"docker" "rm" "-f" "6201f9664a9f81f0031e9375ada991fda5fb78f9b8f61d788489ad3b858557ea"`
Sep 17 15:58:50.167 INFO blam! 6201f9664a9f81f0031e9375ada991fda5fb78f9b8f61d788489ad3b858557ea