Sep 04 00:26:34.170 INFO checking tm4c123x-0.4.0 against master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c for pr-53893
Sep 04 00:26:34.170 INFO running: cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets
Sep 04 00:26:34.170 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53893/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-2/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/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 +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 00:26:34.400 INFO blam! c16302c41bce3eb892f3af2643f6604edfd9581aec08609a8519b62c5492075f
Sep 04 00:26:34.403 INFO running `"docker" "start" "-a" "c16302c41bce3eb892f3af2643f6604edfd9581aec08609a8519b62c5492075f"`
Sep 04 00:26:35.156 INFO kablam!    Compiling cortex-m v0.2.12
Sep 04 00:26:35.156 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 04 00:26:36.662 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 04 00:26:36.662 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 04 00:26:36.662 INFO kablam!    |
Sep 04 00:26:36.662 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 04 00:26:36.662 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 04 00:26:36.662 INFO kablam! 
Sep 04 00:26:36.684 INFO kablam! error: aborting due to previous error
Sep 04 00:26:36.685 INFO kablam! 
Sep 04 00:26:36.685 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 04 00:26:36.692 INFO kablam! error: Could not compile `cortex-m`.
Sep 04 00:26:36.692 INFO kablam! 
Sep 04 00:26:36.692 INFO kablam! To learn more, run the command again with --verbose.
Sep 04 00:26:36.694 INFO kablam! su: No module specific data is present
Sep 04 00:26:37.094 INFO running `"docker" "rm" "-f" "c16302c41bce3eb892f3af2643f6604edfd9581aec08609a8519b62c5492075f"`
Sep 04 00:26:37.242 INFO blam! c16302c41bce3eb892f3af2643f6604edfd9581aec08609a8519b62c5492075f