Category talk:Pages with syntax highlighting errors

At this writing, the following languages used in Wikipedia articles appear to be unsupported by Pygments:

• algol68
• e
• freebasic
• oberon2
• pli
• Unicon

Any others? – Jonesey95 (talk) 20:48, 4 September 2016 (UTC)

:Yes, "text" for starters. If you figure out out to get that supported, please show us how you did it. Thanks, wbm1058 (talk) 10:34, 14 September 2016 (UTC)

: See mw:Extension:SyntaxHighlight#Supported languages, and [expand] the Previously supported lexers box. The documentation seems to erroneously think that text (Plain text) is still supported. – wbm1058 (talk) 10:58, 14 September 2016 (UTC)

: Never mind. text seems to work, as long as the code fragment isn't larger than 100 kB. See {{section link||Syntax highlighting errors}}. – wbm1058 (talk) 12:15, 14 September 2016 (UTC)

In friendly interactive shell, I find lang=fish, console, and bash, all of which are on the [https://github.com/wikimedia/mediawiki-extensions-SyntaxHighlight_GeSHi/blob/master/SyntaxHighlight_GeSHi.lexers.php supported language list]. What am I missing? – Jonesey95 (talk) 20:52, 4 September 2016 (UTC)

:It had a couple of tags that didn't specify a language. This edit fixed it. – wbm1058 (talk) 11:45, 14 September 2016 (UTC)

{{hatnote|Copied from User talk:Magioladitis.}}

Do you have any idea why User:Magioladitis/WikiProjects is in :Category:Pages with syntax highlighting errors? I'm trying to clear that category, not that I know what I'm doing. I've fixed several of them by replacing the tags with

 (preformatted text) tags, such as [https://en.wikipedia.org/w/index.php?title=Talk:List_of_satirical_news_websites&diff=prev&oldid=737742293 here]. – wbm1058 (talk) 20:04, 4 September 2016 (UTC)

:{{tps}} {{replyto|Wbm1058}} Wrong fix - try {{diff|Talk:List of satirical news websites|prev|737748710|this}}. --Redrose64 (talk) 20:26, 4 September 2016 (UTC)
::{{U|Redrose64}}, what is moin and what difference does it make? Cosmetically, the page appears the same. wbm1058 (talk) 20:31, 4 September 2016 (UTC)
:::See User talk:Cedar101#languages for source. One reason to avoid {{tag|pre}} is that in some circumstances, its contents can still be parsed as wikitext. {{tag|source}} - which is essentially synonymous with {{tag|syntaxhighlight}} - prevents such parsing. --Redrose64 (talk) 20:41, 4 September 2016 (UTC)
::::It just seems silly to claim that the code is in something obscure like MoinMoin... the code is in MediaWiki !!  And if we should avoid {{tag|pre}} and use {{tag|source}} or {{tag|syntaxhighlight}}, then the latter two shouldn't dump every page that uses those into :Category:Pages with syntax highlighting errors! Sorry if I seem annoyed (I am), but it's a joke that our documentation of this – Wikipedia:Syntax highlighting – is a disambiguation page. {{tl|dabconcept}}! – wbm1058 (talk) 21:27, 4 September 2016 (UTC)
:::::{{u|Cedar101}}, you have plenty of experience of this, what do you suggest? --Redrose64 (talk) 22:03, 4 September 2016 (UTC)
::::::See bug ticket {{phab|T29828}}. – Jonesey95 (talk) 00:25, 5 September 2016 (UTC)
:Back to the OP's question, I haven't figured out a fix for the User page in question. I tried lang="c#", which appears to be a supported language, but the category persists. – Jonesey95 (talk) 21:03, 4 September 2016 (UTC)
::csharp should be supported, it's listed at [https://github.com/wikimedia/mediawiki-extensions-SyntaxHighlight_GeSHi/blob/master/SyntaxHighlight_GeSHi.lexers.php mediawiki-extensions-SyntaxHighlight_GeSHi/SyntaxHighlight_GeSHi.lexers.php] --Redrose64 (talk) 21:58, 4 September 2016 (UTC)
Maybe the text is too long? -- Magioladitis (talk) 22:00, 4 September 2016 (UTC)
I think there are size limitations. -- Magioladitis (talk) 22:17, 4 September 2016 (UTC)
:That makes sense, as I found a couple other long pages with syntax highlight errors, such as User:BattyBot/CS1 errors-dates. Is this a bug in Pygments? Is there a workaround? If syntax highlighting doesn't work for long pages, then there seems to be no benefit to using {{tag|source}} or {{tag|syntaxhighlight}}, and we may as well just replace them with {{tag|pre}} to clear the category so people don't go chasing down spurious errors. wbm1058 (talk) 22:41, 4 September 2016 (UTC)
::[https://github.com/wikimedia/mediawiki-extensions-SyntaxHighlight_GeSHi "Highlighting large blocks of code can easily generate enough of them to crash a browser. As a guard, syntax highlighting is turned off for code fragments larger than 100 kB."] Can we guess that such code fragments also put the article in the maintenance category? It would be nice to find confirmation of that. – Jonesey95 (talk) 00:27, 5 September 2016 (UTC)

On Sept. 4, 2016 I started working to clear this category, whereupon I reported the issues discussed above. Anyone is welcome to review my edits, the relevant edit history is [https://en.wikipedia.org/w/index.php?title=Special:Contributions/Wbm1058&offset=20160904200000&limit=44&target=Wbm1058 here]. wbm1058 (talk) 12:53, 14 September 2016 (UTC)

One cause that occasionally comes up (which I encountered myself a little over a year ago) is that a user script contains a string constant like '<syntaxhighlight'. This didn't seem to be a problem with GeSHi for some reason. The solution is usually to split the string constant into '<syntaxh' + 'ighlight' or similar.

Should we amend the description of the category to clarify that this is an issue? Should we warn affected users? --SoledadKabocha (talk) 18:53, 26 November 2016 (UTC)

:On second thought, never mind. A quick look through the category shows that extant cases in JavaScript files include MediaWiki:LAPI.js, User:Cacycle/wikEd.js (and a couple forked copies), and MediaWiki:Robots.txt. None of these match the exact problem I described; all may be due to the aforementioned length limit. --SoledadKabocha (talk) 22:28, 19 December 2016 (UTC)