Last modified: 2012-04-08 17:27:12 UTC

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Bug 31824 - Empty <math> tag gives UNIQ


Summary:	Empty <math> tag gives UNIQ

Status:	RESOLVED FIXED

Product:	MediaWiki extensions
Classification:	Unclassified
Component:	Math (Other open bugs)
Version:	unspecified
Hardware:	All All

Importance:	High normal (vote)
Target Milestone:	---
Assigned To:	Nobody - You can work on this!

URL:
Whiteboard:
Keywords:	easy, patch, patch-need-review

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2011-10-19 15:40 UTC by Mark A. Hershberger
Modified:	2012-04-08 17:27 UTC (History)
CC List:	2 users (show)

See Also:
Web browser:	---
Mobile Platform:	---
Assignee Huggle Beta Tester:	---

Attachments
Fix for the empty math tag (481 bytes, patch) 2012-04-06 09:01 UTC, Suhas	Details
Add an attachment (proposed patch, testcase, etc.)

Description Mark A. Hershberger 2011-10-19 15:40:49 UTC

From 
https://en.wikipedia.org/w/index.php?diff=456329927:

Typing <math></math> gives: UNIQ6e8c92a14d4a1f19-math-00000026-QINU.

Granted an empty <math></math> pair is pointless, but one had somehow got into the wikitext of 'Central limit theorem' — see [[Talk:Central limit theorem#Rubbish in Multivariate]]

Comment 1 Mark A. Hershberger 2012-03-23 16:18:02 UTC

http://en.wikipedia.org/w/index.php?title=Benini_distribution&oldid=418462033

Another example.  Seems like the extension should check to see if it has anything before trying to render something.

Tagging easy since that seems like an easy check to make.

Comment 2 Mark A. Hershberger 2012-03-23 16:53:07 UTC

Another example:
http://it.wikipedia.org/w/index.php?diff=48247842&oldid=1746395

Comment 3 Suhas 2012-04-06 09:01:12 UTC

Created attachment 10385 [details]
Fix for the empty math tag

I have attached the patch for this bug. It fixes the bug by returning an empty string if the math tag is empty.

Comment 4 Sumana Harihareswara 2012-04-06 13:00:04 UTC

Thanks for the patch, Suhas!

Comment 5 Antoine "hashar" Musso (WMF) 2012-04-08 10:31:04 UTC

This bug seems to be a regression of bug 8372 "return nothing on empty <math> tags." / r18870 .

Comment 6 Mark A. Hershberger 2012-04-08 17:16:36 UTC

Applied with parser tests: https://gerrit.wikimedia.org/r/4422

Wikimedia Bugzilla is closed!

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