>> On Tue, Mar 22 2016 06:57, Stefan Monnier wrote:

> IIRC past discussions on this issue, one option was to merge your
> set-widen-limits into narrow-to-region by adding an optional argument `hard'.

Stefan, adding extra argument turned to be a train wreck. I am afraid, if I
cannot get help on how to extend primitives, I am giving up at this point.


Adding a dummy argument to Fbobp like this: