https://bugzilla.wikimedia.org/show_bug.cgi?id=71724
Bug ID: 71724
Summary: Crash while serializing
Wikibase\DataModel\ReferenceList
Product: MediaWiki extensions
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: WikidataRepo
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Web browser: ---
Mobile Platform: ---
A core dump was collected showing a crash SplObjectStorage::serialize() while
serializing a Wikibase\DataModel\ReferenceList object.
The request URL was:
http://pt.wikivoyage.org/wiki/Centro-Leste_(Rio_Grande_do_Sul)
The crash is currently reproducible with that URL.
The PHP backtrace was:
#0: serialize
#1: HashBagOStuff::get
#2: Wikibase\Lib\Store\CachingEntityRevisionLookup::getEntityRevision
#3: Wikibase\Lib\Store\RevisionBasedEntityLookup::getEntity
#4: call_user_func_array
#5: Wikibase\Lib\Store\EntityRedirectResolvingDecorator::__call
#6: Wikibase\Lib\Store\EntityRedirectResolvingDecorator::getEntity
#7: Wikibase\Lib\Store\RedirectResolvingEntityLookup::getEntity
#8: Wikibase\Client\Scribunto\WikibaseLuaBindings::getEntity
#9: Scribunto_LuaWikibaseLibrary::getEntity
#10: call_user_func_array
#11: Scribunto_LuaSandboxCallback::__call
#12: Scribunto_LuaSandboxCallback::getEntity
#13: LuaSandboxFunction::call
#14: call_user_func_array
#15: Scribunto_LuaSandboxInterpreter::callFunction
#16: Scribunto_LuaEngine::executeFunctionChunk
#17: Scribunto_LuaModule::invoke
#18: ScribuntoHooks::invokeHook
#19: call_user_func_array
#20: Parser::callParserFunction
#21: Parser::braceSubstitution
#22: PPFrame_DOM::expand
#23: ExtParserFunctions::ifObj
#24: call_user_func_array
#25: Parser::callParserFunction
#26: Parser::braceSubstitution
#27: PPFrame_DOM::expand
#28: ExtParserFunctions::ifObj
#29: call_user_func_array
#30: Parser::callParserFunction
#31: Parser::braceSubstitution
#32: PPFrame_DOM::expand
#33: PPTemplateFrame_DOM::cachedExpand
#34: Parser::braceSubstitution
#35: PPFrame_DOM::expand
#36: Parser::replaceVariables
#37: Parser::internalParse
#38: Parser::parse
#39: WikitextContent::fillParserOutput
#40: AbstractContent::getParserOutput
#41: PoolWorkArticleView::doWork
#42: PoolCounterWork::execute
#43: WikiPage::getParserOutput
#44: GeoCrumbs::getParserCache
#45: GeoCrumbs::makeTrail
#46: GeoCrumbs::onSkinTemplateOutputPageBeforeExec
#47: call_user_func_array
#48: Hooks::run
#49: wfRunHooks
#50: SkinTemplate::prepareQuickTemplate
#51: SkinTemplate::outputPage
#52: OutputPage::output
#53: MediaWiki::main
#54: MediaWiki::run
The top of the gdb backtrace was:
(gdb) bt
#0 0x00007fea99b79e84 in zend_object_store_get_object (zobject=0x7feaa0ee63a0)
at /tmp/buildd/php5-5.3.10/Zend/zend_objects_API.c:272
#1 0x00007fea99b76039 in zend_std_object_get_class (object=0x7feaa0ee63a0)
at /tmp/buildd/php5-5.3.10/Zend/zend_object_handlers.c:1234
#2 0x00007fea99ac1530 in php_var_serialize_intern (buf=0x7fff49038a70,
struc=0xcccccccccccccccd,
var_hash=0x7fff49038a00) at /tmp/buildd/php5-5.3.10/ext/standard/var.c:767
#3 0x00007fea99ac1ea6 in php_var_serialize_intern (buf=0x7fff49038a70,
struc=0x7fff49038a00, var_hash=0x56)
at /tmp/buildd/php5-5.3.10/ext/standard/var.c:866
#4 0x00007fea99ac716c in php_var_serialize (buf=0x7fff49038a70, struc=0x58,
var_hash=0x7fea9a28ae80)
at /tmp/buildd/php5-5.3.10/ext/standard/var.c:885
#5 0x00007fea99a6cd69 in zim_spl_SplObjectStorage_serialize (ht=-1594987592,
return_value=0x7feaa2685458,
return_value_ptr=0x7fea9a28ae80, this_ptr=0xb6b84cc231a29827,
return_value_used=-1565637857)
at /tmp/buildd/php5-5.3.10/ext/spl/spl_observer.c:683
The immediate cause of the crash was an invalid object handle in a zval, out of
the bounds of object_buckets, but handlers was apparently correct since it was
set to spl_handler_ArrayObject.
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