https://bugzilla.wikimedia.org/show_bug.cgi?id=32594
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Bug #: 32594
Summary: SMW: [[Corresponds to::0 xxx]] causes divizion by
zero, internal error message and PHP stack dump
Product: MediaWiki extensions
Version: any
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Semantic MediaWiki
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
`[[Corresponds to::0 xxx]]' causes error message:
Warning: Division by zero in /var/www/ocw/mediawiki-1.17.1/extensions
/SemanticMediaWiki/includes/datavalues/SMW_DV_Quantity.php on line 30
and `Special:Internal error' with stack backtrace:
Initialisation value '' is not a number.
Backtrace:
#0
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/datavalues/SMW_DV_Quantity.php(30):
SMWDINumber->__construct(false, '_qty')
#1
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/datavalues/SMW_DV_Number.php(110):
SMWQuantityValue->convertToMainUnit(1, '????????')
#2
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/datavalues/SMW_DataValue.php(169):
SMWNumberValue->parseUserValue('1 ????????')
#3
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/SMW_DataValueFactory.php(113):
SMWDataValue->setUserValue('1 ????????', false)
#4
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/SMW_DataValueFactory.php(177):
SMWDataValueFactory::newTypeIdValue('_qty', '1 ????????', false,
Object(SMWDIProperty), Object(SMWDIWikiPage))
#5
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/SMW_ParseData.php(113):
SMWDataValueFactory::newPropertyObjectValue(Object(SMWDIProperty), '1
????????', false, Object(SMWDIWikiPage))
#6
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/SMW_ParserExtensions.php(165):
SMWParseData::addProperty('Time to search', '1 ????????', false,
Object(Parser), true)
#7
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/SMW_ParserExtensions.php(112):
SMWParserExtensions::parsePropertiesCallback(Array)
#8 [internal function]:
SMWParserExtensions::simpleParsePropertiesCallback(Array)
#9
/var/www/ocw/mediawiki-1.17.1/extensions/SemanticMediaWiki/includes/SMW_ParserExtensions.php(71):
preg_replace_callback('/\[\[ ...', Array, '?* [[Time to se...')
#10 [internal function]:
SMWParserExtensions::onInternalParseBeforeLinks(Object(Parser), '?* [[Time to
se...', Object(StripState))
#11 /var/www/ocw/mediawiki-1.17.1/includes/Hooks.php(158):
call_user_func_array(Array, Array)
#12 /var/www/ocw/mediawiki-1.17.1/includes/parser/Parser.php(1005):
wfRunHooks('InternalParseBe...', Array)
#13 /var/www/ocw/mediawiki-1.17.1/includes/parser/Parser.php(283):
Parser->internalParse('<!-- * [[Time t...')
#14 /var/www/ocw/mediawiki-1.17.1/includes/EditPage.php(1939):
Parser->parse('<!-- * [[Time t...', Object(Title), Object(ParserOptions))
#15 /var/www/ocw/mediawiki-1.17.1/includes/EditPage.php(1218):
EditPage->getPreviewText()
#16 /var/www/ocw/mediawiki-1.17.1/includes/EditPage.php(437):
EditPage->showEditForm()
#17 /var/www/ocw/mediawiki-1.17.1/includes/EditPage.php(296): EditPage->edit()
#18 /var/www/ocw/mediawiki-1.17.1/includes/Wiki.php(522): EditPage->submit()
#19 /var/www/ocw/mediawiki-1.17.1/includes/Wiki.php(69):
MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title),
Object(User), Object(WebRequest))
#20 /var/www/ocw/mediawiki-1.17.1/index.php(114):
MediaWiki->performRequestForTitle(Object(Title), Object(Article),
Object(OutputPage), Object(User), Object(WebRequest))
#21 {main}
Zero value for `Corresponds to' is a user mistake, but it should not cause SMW
internal error with PHP stack dump.
BTW, I faced with problem by a mistake. I wrote `[[Corresponds to::0.001 km]]'.
Looks pretty good, doesn't? But MW content language specifies decimal separator
as comma, so `0.001 km' is parsed as number `0' and unit `.0001 km'. However,
no warning or errors are show on property page. Instead, it causes stack dump
on another page…
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