Last modified: 2013-10-29 06:58:45 UTC

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Bug 54815 - Flow failures "Base lambda function for closure not found" in error.log
Flow failures "Base lambda function for closure not found" in error.log
Status: RESOLVED FIXED
Product: MediaWiki extensions
Classification: Unclassified
Flow (Other open bugs)
master
All All
: Normal major (vote)
: ---
Assigned To: Erik Bernhardson
:
Depends on:
Blocks:
  Show dependency tree / graph
 
Reported: 2013-10-01 04:00 UTC by spage
Modified: 2013-10-29 06:58 UTC (History)
3 users (show)

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

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Description spage 2013-10-01 04:00:19 UTC 
Sometimes ee-flow only loads part of a Flow page (and none of the page skin), or reports an error trying to submit a post.

/var/log/apache2/error.log reliably contains:

PHP Fatal error:  Base lambda function for closure not found in /srv/mediawiki/extensions/Flow/templates/post.html.php on line 5, referer: http://ee-flow.wmflabs.org/wiki/Special:Flow/<some page>

ErikB comments that it's a bug in the PHP APC accelerator [I think https://bugs.php.net/bug.php?id=52144].  It was fixed in version 3.1.10 of the php-apc package, but our servers run Ubuntu 12.04 (precise) for which the package is 3.1.7.  PHP 5.3.19 is the first PHP version with the fix. ErikB remarks `the temporary workaround is "never put a lambda (anonymous function) at the top level of a php file"'
Comment 1 spage 2013-10-01 04:41:02 UTC 
Prioritization and scheduling of this bug is tracked on Mingle card https://mingle.corp.wikimedia.org/projects/flow/cards/273
Comment 2 spage 2013-10-07 18:10:54 UTC 
We've applied the workaround to Echo files potentially subject to this bug. We need a reproduceable test case to encourage operations to carry the php-apc patch.
Comment 3 Andrew Garrett 2013-10-29 06:58:45 UTC 
This is resolved for our purposes by 79f8e0b6.
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