bug#5122: Mismatched parentheses when dealing with huge buffercontent

[Chong Yidong <cyd@stupidchicken.com>]

Eli Zaretskii <eliz@gnu.org> writes:

>> Like I said, if there is no matching parenthesis within the search
>> limit (which, btw, has been increased in Emacs 22.3), in most cases
>> the parentheses really are mismatched.
>
> But we don't know that, unless we searched all the way to the
> beginning or end of the buffer.  All we know is that we didn't find a
> match within the distance searched.

I understand what you're saying.  But even if there is a "matching"
paren more than 102k characters away (the blink-matching-paren-distance
default), chances are that's a mistake anyway.

Yes, I know the failure condition exists.  But for every user
enlightened by a more verbose error message, I think there will be
hundreds more that will be unnecessarily confused.