Arch Linux

jschuster

Member

Registered: 2013-06-30

Posts: 14

Website

Upgrading pcre to 8.34 causes errors in mediawiki

A breaking change in pcre-8.34 causes a bug in mediawiki where many of the pages show up blank (with no content), because of a PHP error happening under the covers. The bug has been reported and fixed upstream.

This won't be fixed in the Arch package until the new mediawiki release, but until then, these steps worked for me:

1. Downgrade pcre to 8.33.

2. Restart your machine. For some reason just restarting Apache didn't fix the issue for me, but restarting my whole machine did. I probably just missed a step.

3. Edit a page in your wiki and save it, without making changes. At least for me, this seemed to fix all the other pages.

There's more info at the linked bug, but these steps might help any Arch users running into the issue.

Pierre

Developer

From: Bonn

Registered: 2004-07-05

Posts: 1,967

Website

Re: Upgrading pcre to 8.34 causes errors in mediawiki

This is already fixed in the arch package. I'd also recommend to apply the patch to mediawiki if you are not using the package from the repos rather than downgrading pcre.

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jschuster

Member

Registered: 2013-06-30

Posts: 14

Website

Re: Upgrading pcre to 8.34 causes errors in mediawiki

You're right, my mistake. I must have upgraded just before the most recent Arch package. Thanks for the update.