bug#6830: widget-complete bad completions in :type 'file

[Chong Yidong]

Eli Zaretskii <eliz@gnu.org> writes:

> On GNU/Linux, the first overlay in the sorted array happens to be the
> one whose `field' value is equal to the text property, so find_field
> works.  On MS-Windows, the first overlay is the one whose value is
> `completion', so find_field decides that the field begins and ends at
> the same position.  The rest, as they say, is history.

Interesting.  The overlays code should be independent of operating
system.  Any idea what causes the sort order to be different?

Does the problem go away if in

    (let ((minibuffer-completion-table collection)
          (minibuffer-completion-predicate predicate)
          (ol (make-overlay start end nil nil t)))
      (overlay-put ol 'field 'completion)

you also specify a `priority' of (say) 5?