Sep 05 23:26:55.916 INFO checking stm32f303x-memory-map-0.1.1 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 05 23:26:55.916 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 05 23:26:55.916 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-4/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 05 23:26:56.170 INFO blam! fae1b4c5c31c37c4f0012cde65779d3a57441b4c9194d591f8fd1e2a4c8bf2cf
Sep 05 23:26:56.172 INFO running `"docker" "start" "-a" "fae1b4c5c31c37c4f0012cde65779d3a57441b4c9194d591f8fd1e2a4c8bf2cf"`
Sep 05 23:26:57.661 INFO kablam! usermod: no changes
Sep 05 23:26:57.705 INFO kablam!    Compiling cortex-m v0.2.12
Sep 05 23:26:57.706 INFO kablam!     Checking cortex-m-semihosting v0.1.3
Sep 05 23:26:58.781 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 05 23:26:58.781 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.2.12/src/lib.rs:16:12
Sep 05 23:26:58.781 INFO kablam!    |
Sep 05 23:26:58.781 INFO kablam! 16 | #![feature(const_unsafe_cell_new)]
Sep 05 23:26:58.781 INFO kablam!    |            ^^^^^^^^^^^^^^^^^^^^^
Sep 05 23:26:58.781 INFO kablam! 
Sep 05 23:26:58.795 INFO kablam! error: aborting due to previous error
Sep 05 23:26:58.795 INFO kablam! 
Sep 05 23:26:58.795 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 05 23:26:58.808 INFO kablam! error: Could not compile `cortex-m`.
Sep 05 23:26:58.808 INFO kablam! 
Sep 05 23:26:58.808 INFO kablam! To learn more, run the command again with --verbose.
Sep 05 23:26:58.810 INFO kablam! su: No module specific data is present
Sep 05 23:26:59.335 INFO running `"docker" "rm" "-f" "fae1b4c5c31c37c4f0012cde65779d3a57441b4c9194d591f8fd1e2a4c8bf2cf"`
Sep 05 23:26:59.443 INFO blam! fae1b4c5c31c37c4f0012cde65779d3a57441b4c9194d591f8fd1e2a4c8bf2cf