bug#60467: 30.0.50; primitive-undo: Changes to be undone by function different from announced

[Gregory Heytings]

> > It's not clear to me what you want: do you want to fix this issue on 
> > the emacs-29 branch or on the master branch?
>
> I suggested to install your fix on master.

Okay, but see below.

> > We now have two bug reports on this (the one by Frédéric Giquel in this 
> > bug, and the one by Eason Huang in bug#64989).  I just verified (again) 
> > that the Fix-combine-change-call-with-timestamps patch fixes these two 
> > recipes.
>
> If bug#64989 could be fixed by a simpler, safer change (which remains to 
> be seen), we might do that on emacs-29.  If not, at least we will have 
> this fixed in Emacs 30.

Bug#64989 is the same bug, only the recipe differs.  And the change I 
suggested six months ago is safe, it replaces an obscure and bugged piece 
of code with a refactored and clear piece of code.  I attach it again 
(that patch is for emacs-29, the one for master would be similar).

If Stefan (or anyone else) fixes the bug in a safer way, that patch is not 
necessary.

Fix-combine-change-call.patch
Description: Text Data