bug#37507: 26.3; Non-number value for `fill-column' causes wrong-type-arg error for `C-h f'

[Noam Postavsky]

Drew Adams <drew.adams@oracle.com> writes:

> `fill-column' is supposed to have an integer value > 0.
>
> But if it has a non-numeric value then other functions can barf, unless
> they watch out for that.

Shouldn't users just not set it to a non-numeric value then?  I'm sure
you can cause all sort of errors by setting things to invalid values.

> emacs -Q
>
> (setq fill-column nil)

Do you mean setq-default (otherwise I can't reproduce)?

> C-h f forward-char ; raises error