From b485fcd16a562f80c78a7d87857be9f149b55bf5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bartosz=20Dziewo=C5=84ski?= <matma.rex@gmail.com>
Date: Sat, 13 Mar 2021 00:29:03 +0100
Subject: [PATCH] mw.widgets.CategoryMultiselectWidget: Fix exception on
 invalid input

Bug: T262466
Change-Id: Ia17d4631bac516c795be173e467cfa61b1c6c254
---
 .../mw.widgets.CategoryMultiselectWidget.js           | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/resources/src/mediawiki.widgets/mw.widgets.CategoryMultiselectWidget.js b/resources/src/mediawiki.widgets/mw.widgets.CategoryMultiselectWidget.js
index 2cac3954e83..39da4504bf7 100644
--- a/resources/src/mediawiki.widgets/mw.widgets.CategoryMultiselectWidget.js
+++ b/resources/src/mediawiki.widgets/mw.widgets.CategoryMultiselectWidget.js
@@ -185,6 +185,17 @@
 		return deferred.promise();
 	};
 
+	/**
+	 * @inheritdoc
+	 */
+	mw.widgets.CategoryMultiselectWidget.prototype.isAllowedData = function ( data ) {
+		var title = mw.Title.makeTitle( NS_CATEGORY, data );
+		if ( !title ) {
+			return false;
+		}
+		return mw.widgets.CategoryMultiselectWidget.parent.prototype.isAllowedData.call( this, data );
+	};
+
 	/**
 	 * @inheritdoc
 	 */