GNU bug report logs - #33887
26.1; Emacs hangs for several seconds when going to the end of an XML file in nXML mode

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From: Noam Postavsky <npostavs <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: Vincent Lefevre <vincent <at> vinc17.net>, 33887 <at> debbugs.gnu.org
Subject: bug#33887: 26.1; Emacs hangs for several seconds when going to the end of an XML file in nXML mode
Date: Sun, 19 May 2019 15:03:33 -0400

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:

> Can you summarize the origin of the problem in his example?

<t>>1</t>

(syntax-ppss) on the location of "1" in the above, gives (-1 ...).  And
then (syntax-ppss) on the "/" will give (0 ...).  So the syntax
propertize rule for quote use of (zerop (car (syntax-ppss))) no longer
works correctly to see whether it's inside or outside a tag.

">" outside of tags should be set to syntax ".", but I would assume that
adding a syntax-propertize rule which calls syntax-ppss for every ">"
(to check whether it's inside a tag or not) will be very slow, just like
calling it for every quote was.

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