Sep 10 07:44:01.643 INFO checking tm4c123x-0.4.0 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 07:44:01.643 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 07:44:01.644 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-5/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 07:44:01.843 INFO blam! d4201ae811ad0e43506612dd35e4ff5b4dc1595d04af448429394c33caffd848
Sep 10 07:44:01.845 INFO running `"docker" "start" "-a" "d4201ae811ad0e43506612dd35e4ff5b4dc1595d04af448429394c33caffd848"`
Sep 10 07:44:03.702 INFO kablam! usermod: no changes
Sep 10 07:44:03.810 INFO kablam!    Compiling cortex-m v0.2.12
Sep 10 07:44:03.810 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 10 07:44:03.810 INFO kablam!     Checking aligned v0.1.2
Sep 10 07:44:05.675 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 10 07:44:05.675 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 10 07:44:05.675 INFO kablam!    |
Sep 10 07:44:05.675 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 10 07:44:05.675 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 10 07:44:05.675 INFO kablam! 
Sep 10 07:44:05.687 INFO kablam! error: aborting due to previous error
Sep 10 07:44:05.687 INFO kablam! 
Sep 10 07:44:05.687 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 10 07:44:05.694 INFO kablam! error: Could not compile `cortex-m`.
Sep 10 07:44:05.695 INFO kablam! 
Sep 10 07:44:05.695 INFO kablam! To learn more, run the command again with --verbose.
Sep 10 07:44:05.697 INFO kablam! su: No module specific data is present
Sep 10 07:44:07.327 INFO running `"docker" "rm" "-f" "d4201ae811ad0e43506612dd35e4ff5b4dc1595d04af448429394c33caffd848"`
Sep 10 07:44:07.441 INFO blam! d4201ae811ad0e43506612dd35e4ff5b4dc1595d04af448429394c33caffd848