error: proc macro panicked
 --> tests/compile_failures/mismatch_split_then_combine.rs:4:13
  |
4 |     let _ = splitbits_then_combine!(0b1001_1010, "aaab bbbb", "bbba aaaa");
  |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = help: message: assertion `left == right` failed: The width of field 'b' must match between the input templates and the output template.
            left: 5
           right: 3