[Wikitext-l] Problematic url http://parsoid.wmflabs.org/zh//dev/null

Hi, http://parsoid.wmflabs.org/zh//dev/null gives an error: TypeError: Cannot read property 'ns' of undefined at Function.Title.fromPrefixedText (/data/project/parsoid/js/lib/mediawiki.Title.js:59:40) at MWParserEnvironment.reset (/data/project/parsoid/js/lib/mediawiki.parser.environment.js:216:20) at Function.MWParserEnvironment.getParserEnv (/data/project/parsoid/js/lib/mediawiki.parser.environment.js:280:7) at parserEnvMw (/data/project/parsoid/js/api/ParserService.js:432:22) at callbacks (/data/project/parsoid/js/node_modules/express/lib/router/index.js:164:37) at interParams (/data/project/parsoid/js/api/ParserService.js:428:2) at callbacks (/data/project/parsoid/js/node_modules/express/lib/router/index.js:164:37) at param (/data/project/parsoid/js/node_modules/express/lib/router/index.js:138:11) at pass (/data/project/parsoid/js/node_modules/express/lib/router/index.js:145:5) at Router._dispatch (/data/project/parsoid/js/node_modules/express/lib/router/index.js:173:5) But this should give a valid result like: https://zh.wikipedia.org/wiki//dev/null It this normal? Regards Emmanuel -- Kiwix - Wikipedia Offline & more * Web: http://www.kiwix.org * Twitter: https://twitter.com/KiwixOffline * more: http://www.kiwix.org/wiki/Communication