Sep 10 08:45:17.374 INFO checking stm32f429x-0.3.1 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 08:45:17.374 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 08:45:17.374 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-4/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 08:45:17.593 INFO blam! 2cee56a79a3ae731de31b4c3c6d8e375b70a58bc13f07d20df95ded43b2ab4cb
Sep 10 08:45:17.595 INFO running `"docker" "start" "-a" "2cee56a79a3ae731de31b4c3c6d8e375b70a58bc13f07d20df95ded43b2ab4cb"`
Sep 10 08:45:19.106 INFO kablam! usermod: no changes
Sep 10 08:45:19.255 INFO kablam!    Compiling cortex-m v0.2.12
Sep 10 08:45:19.278 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 10 08:45:20.746 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 10 08:45:20.746 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 10 08:45:20.746 INFO kablam!    |
Sep 10 08:45:20.746 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 10 08:45:20.746 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 10 08:45:20.746 INFO kablam! 
Sep 10 08:45:20.758 INFO kablam! error: aborting due to previous error
Sep 10 08:45:20.758 INFO kablam! 
Sep 10 08:45:20.758 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 10 08:45:20.762 INFO kablam! error: Could not compile `cortex-m`.
Sep 10 08:45:20.762 INFO kablam! 
Sep 10 08:45:20.762 INFO kablam! To learn more, run the command again with --verbose.
Sep 10 08:45:20.778 INFO kablam! su: No module specific data is present
Sep 10 08:45:22.086 INFO running `"docker" "rm" "-f" "2cee56a79a3ae731de31b4c3c6d8e375b70a58bc13f07d20df95ded43b2ab4cb"`
Sep 10 08:45:22.198 INFO blam! 2cee56a79a3ae731de31b4c3c6d8e375b70a58bc13f07d20df95ded43b2ab4cb