Last modified: 2009-05-02 14:48:36 UTC
The following API edit request throws an internal exception. This was very repeatable; I was able to turn on debugging and run the script again to capture the stack trace. The page in question is "Category:Unassessed Grey's Anatomy articles" on enwiki. This is probably related to some other bug, since the page has a lingering parser strip tag (UNIQ67316ef51deb354-nowiki-00000000-QINU) that does not disappear even when I edit the page manually. But index.php is able to edit the page, while the API is not. API request parameters: Base URL: http://en.wikipedia.org/w/api.php Logged in as WP 1.0 bot action => 'edit' token => redacted summary => 'Add to [[Category:Unassessed-Class articles]]' text => '{{categoryTOC}} {{Cat class|topic=Grey's Anatomy|sort=Grey's Anatomy|class=Unassessed}} Grey's Anatomy articles rated as B-Class on the [[Wikipedia:Version 1.0 Editorial Team/Assessment|Wikipedia 1.0 Assessment Scale]]. Add items to this category by typing <nowiki>{{Project Grey's Anatomy|class=Unassessed}}</nowiki> on the article's <u>talk</u> page. <categorytree>Unassessed-Class Grey's Anatomy articles</categorytree> [[Category:Grey's Anatomy articles by quality]] [[Category:Unassessed-Class articles|Grey's Anatomy articles]]' title => 'Category:Unassessed Grey's Anatomy articles' format => 'xml' bot => '1' Response info: 'code' => 'internal_api_error_MWException' 'error' => { 'info' => 'Exception Caught: Empty $wgTitle in OutputPage::parse', 'content' => ' #0 [internal function]: OutputPage->parse(\'Category <i>Una...\', true, true) #1 /usr/local/apache/common-local/php-1.5/includes/StubObject.php(58): call_user_func_array(Array, Array) #2 /usr/local/apache/common-local/php-1.5/includes/StubObject.php(76): StubObject->_call(\'parse\', Array) #3 [internal function]: StubObject->__call(\'parse\', Array) #4 /usr/local/apache/common-local/php-1.5/includes/GlobalFunctions.php(740): StubObject->parse(\'Category <i>Una...\', true, true) #5 /usr/local/apache/common-local/php-1.5/extensions/CategoryTree/CategoryTreeFunctions.php(377): wfMsgExt(\'categorytree-no...\', \'parseinline\', \'Unassessed-Clas...\') #6 /usr/local/apache/common-local/php-1.5/extensions/CategoryTree/CategoryTree.php(347): CategoryTree->getTag(Object(Parser), \'Unassessed-Clas...\', NULL, Array, 1, false) #7 [internal function]: efCategoryTreeParserHook(\'Unassessed-Clas...\', Array, Object(Parser)) #8 /usr/local/apache/common-local/php-1.5/includes/parser/Parser.php(3232): call_user_func_array(\'efCategoryTreeP...\', Array) #9 /usr/local/apache/common-local/php-1.5/includes/parser/Preprocessor_DOM.php(1026): Parser->extensionSubstitution(Array, Object(PPFrame_DOM)) #10 /usr/local/apache/common-local/php-1.5/includes/parser/Parser.php(2623): PPFrame_DOM->expand(Object(PPNode_DOM), 0) #11 /usr/local/apache/common-local/php-1.5/includes/parser/Parser.php(875): Parser->replaceVariables(\'{{categoryTOC}}...\') #12 /usr/local/apache/common-local/php-1.5/includes/parser/Parser.php(327): Parser->internalParse(\'{{categoryTOC}}...\') #13 /usr/local/apache/common-local/php-1.5/includes/Article.php(2854): Parser->parse(\'{{categoryTOC}}...\', Object(Title), Object(ParserOptions), true, true, NULL) #14 /usr/local/apache/common-local/php-1.5/extensions/SpamBlacklist/SpamBlacklist_body.php(218): Article->prepareTextForEdit(\'{{categoryTOC}}...\') #15 /usr/local/apache/common-local/php-1.5/extensions/SpamBlacklist/SpamBlacklist.php(106): SpamBlacklist->filter(Object(Title), \'{{categoryTOC}}...\', \'\', \'\', Object(EditPage)) #16 [internal function]: wfSpamBlacklistFilterAPIEditBeforeSave(Object(EditPage), \'{{categoryTOC}}...\', Array) #17 /usr/local/apache/common-local/php-1.5/includes/Hooks.php(117): call_user_func_array(\'wfSpamBlacklist...\', Array) #18 /usr/local/apache/common-local/php-1.5/includes/api/ApiEditPage.php(180): wfRunHooks(\'APIEditBeforeSa...\', Array) #19 /usr/local/apache/common-local/php-1.5/includes/api/ApiMain.php(431): ApiEditPage->execute() #20 /usr/local/apache/common-local/php-1.5/includes/api/ApiMain.php(261): ApiMain->executeAction() #21 /usr/local/apache/common-local/php-1.5/includes/api/ApiMain.php(245): ApiMain->executeActionWithErrorHandling() #22 /usr/local/apache/common-local/php-1.5/api.php(77): ApiMain->execute() #23 /usr/local/apache/common-local/live-1.5/api.php(3): require(\'/usr/local/apac...\') #24 {main}'
Possibly related to bug 16129 but with another extension causing it? CategoryTree in this case?
The categorytree issue may be bug 16744.
It looks like SpamBlacklist is parsing the submitted text using Article::prepareTextForEdit() which in turn calls Parser::parse(), then CategoryTree is called from the parser and uses wfMsgExt() with 'parseinline', which it shouldn't be doing because parseinline uses $wgParser and $wgTitle, which may very well be different from the parser and title CategoryTree was called for (which is the case here: $wgTitle is null). Either CategoryTree should be fixed, or parseinline should handle $wgTitle == null more gracefully. I don't know which I prefer just yet, I'm gonna talk this through with Tim first.
*** Bug 18120 has been marked as a duplicate of this bug. ***
(In reply to comment #4) > *** Bug 18120 has been marked as a duplicate of this bug. *** > In this report, it was {{Special:Unreviewpages}} returning an empty list (and probably calling wfMsgExt() with 'parse' or 'parseinline' in the process) that caused the error.
This should be fixed by r50132
