Re: how to track down "invalid face attribute" errors?

[Robert Pluim]

>>>>> On Wed, 28 Sep 2022 07:41:38 -0400, Stefan Monnier via Users list for the 
>>>>> GNU Emacs text editor <help-gnu-emacs@gnu.org> said:

    Stefan> Emanuel Berg [2022-09-25 15:00:31] wrote:
    >> Sounds like that error message should be changed to include
    >> what face causes trouble, if possible?

    Stefan> IIUC this message comes when the face is not a symbol but a plist of
    Stefan> properties, so there's a good chance that printing the face will 
just
    Stefan> say (:foreground nil) and thus won't help you.  A better option 
might be
    Stefan> to include the position of the problem, so you can then go and
    Stefan> investigate the text properties and overlays at that position.

Yes, (:foreground nil) is what you get. And by the time the log is
produced in `merge_face_ref', thereʼs no trace left of the position
weʼre looking at.

Robert
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