GNU bug report logs - #42267
Fontification takes a long time when an equation contains a double prime

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Message #23 received at 42267 <at> debbugs.gnu.org (full text, mbox):

From: Ikumi Keita <ikumi <at> ikumi.que.jp>
To: 42267 <at> debbugs.gnu.org
Subject: Re: bug#42267: Fontification takes a long time when an equation
 contains a double prime
Date: Sat, 11 Jul 2020 14:55:18 +0900

[Message part 1 (text/plain, inline)]

>>>>> Ikumi Keita <ikumi <at> ikumi.que.jp> writes:
> I think the behavior of the above item 1 is a bug. When f-l-e-r-b-q
> cannot find a matching opening quote, it should just give up to extend
> the region anymore.

After reconsideration, I realized that such giving up is not appropriate
when that unmatched close quote has, in front of it, other open-close
quote pairs. Examples:
      abc ``def ghi'' jkl $y''=x^{2}$
      abc <<def ghi>> jkl $y''=x^{2}$

So the correct way is to continue searching backwards another close
quote, I think. The revised patch is attached. I'll install it soon.

Regards,
Ikumi Keita

[0001-Don-t-extend-font-lock-region-too-eagerly-bug-42267.patch (text/x-diff, attachment)]

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