CHUI-893 ([CHUIBUG]Chat input field scrambles "/nod")

indra/newview/llfloaterimnearbychat.cpp

@@ -485,11 +485,14 @@ void LLFloaterIMNearbyChat::onChatBoxKeystroke()
 		if (LLGestureMgr::instance().matchPrefix(utf8_trigger, &utf8_out_str))
 		{
 			std::string rest_of_match = utf8_out_str.substr(utf8_trigger.size());
-			mInputEditor->setText(utf8_trigger + rest_of_match); // keep original capitalization for user-entered part
+			if (!rest_of_match.empty())
+			{
+				mInputEditor->setText(utf8_trigger + rest_of_match); // keep original capitalization for user-entered part
 
-			// Select to end of line, starting from the character
-			// after the last one the user typed.
-			mInputEditor->selectNext(rest_of_match, false);
+				// Select to end of line, starting from the character
+				// after the last one the user typed.
+				mInputEditor->selectNext(rest_of_match, false);
+			}
 		}
 		else if (matchChatTypeTrigger(utf8_trigger, &utf8_out_str))
 		{