ErrorException from line 63 of "Csv.php": PHP Notice: fputcsv(): delimiter must be a single character

[kghbln]

Setup and configuration

• MediaWiki | 1.31.1 (590e94d)00:42, 3 October 2018
• PHP | 7.0.32-0ubuntu0.16.04.1 (apache2handler)
• MySQL | 5.7.23-0ubuntu0.16.04.1
• Semantic MediaWiki | 3.0.0-rc.2 (4751a28) 22:15, 3 October 2018

Issue

ErrorException from line 63 of /var/www/html/02310/w/extensions/SemanticMediaWiki/src/Utils/Csv.php: PHP Notice: fputcsv(): delimiter must be a single character

The results however get exported as expected.

Stack trace

2018-10-06 21:46:48 Ubuntu-1510-wily-64-minimal DB0231020151216: [2e61330fb8cd37465af51458] /wiki/Special:Ask/cl:YzpdkMFOwzAMhp-FOyFVq4EUKZcxTXAGcc-6vyNaYgfHncTbk24coJIPtvV9tuwcIqVwQPI2xRzVD5blCPFH1NFWFvV74Wz67gKpkcnyNFUs3MSSg_qxXppKZ09MsBVBxs_bxOe3D6vIJQWF_9UXskHF35v-kQ61mGFrzWbbYsdjpInbqhyqQlpSwgnOvSAV97qoaL2vGRJRzWa3RN-t5RToNF890Ar6f4lzd93D0w2xZtiv7mydd_5TF4Hqd5FI6lVm2Jnai0LBtfoB   ErrorException from line 63 of /.../extensions/SemanticMediaWiki/src/Utils/Csv.php: PHP Notice: fputcsv(): delimiter must be a single character
#0 [internal function]: MWExceptionHandler::handleError(integer, string, string, integer, array)
#1 /.../extensions/SemanticMediaWiki/src/Utils/Csv.php(63): fputcsv(resource, array, string)
#2 /.../extensions/SemanticMediaWiki/src/Query/ResultPrinters/CsvFileExportPrinter.php(176): SMW\Utils\Csv->toString(array, array, string)
#3 /.../extensions/SemanticMediaWiki/src/Query/ResultPrinters/CsvFileExportPrinter.php(123): SMW\Query\ResultPrinters\CsvFileExportPrinter->getCsv(SMW\Utils\Csv, SMWQueryResult)
#4 /.../extensions/SemanticMediaWiki/src/Query/ResultPrinters/ResultPrinter.php(342): SMW\Query\ResultPrinters\CsvFileExportPrinter->getResultText(SMWQueryResult, integer)
#5 /.../extensions/SemanticMediaWiki/src/Query/ResultPrinters/ResultPrinter.php(307): SMW\Query\ResultPrinters\ResultPrinter->buildResult(SMWQueryResult)
#6 /.../extensions/SemanticMediaWiki/src/Query/ResultPrinters/FileExportPrinter.php(52): SMW\Query\ResultPrinters\ResultPrinter->getResult(SMWQueryResult, array, integer)
#7 /.../extensions/SemanticMediaWiki/src/MediaWiki/Specials/SpecialAsk.php(331): SMW\Query\ResultPrinters\FileExportPrinter->outputAsFile(SMWQueryResult, array)
#8 /.../extensions/SemanticMediaWiki/src/MediaWiki/Specials/SpecialAsk.php(169): SMW\MediaWiki\Specials\SpecialAsk->makeHTMLResult()
#9 /.../includes/specialpage/SpecialPage.php(522): SMW\MediaWiki\Specials\SpecialAsk->execute(string)
#10 /.../includes/specialpage/SpecialPageFactory.php(568): SpecialPage->run(string)
#11 /.../includes/MediaWiki.php(288): SpecialPageFactory::executePath(Title, RequestContext)
#12 /.../includes/MediaWiki.php(861): MediaWiki->performRequest()
#13 /.../includes/MediaWiki.php(524): MediaWiki->main()
#14 /.../index.php(42): MediaWiki->run()
#15 {main}