Re: How can I undo a change from a modification-hook?

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> [ and while you're there, check that the beg/end/len is within the
>> announces beg/end stashed earlier, and if it's not just don't do
>> anything since it means the stash buffer-undo-list is likely
>> unrelated.  ]
> This part worries me.  Could you clarify when this would happen?

In rare corner cases (most of them bugs).

> Not doing anything is risky, because it puts the buffer in an inconsistent
> state wrt the subprocess :/

In the case of PG, I'd suggest you treat such a case as
a non-whitespace change.


        Stefan