Add failing test

Author: jakebailey

tests/cases/fourslash/badJSDocNoCrash.ts

@@ -0,0 +1,11 @@
+/// <reference path="fourslash.ts" />
+
+// @filename: index.js
+//// class I18n {
+////     /**
+////      * @param {{dot|fulltext}} [stringMode] - which mode our translation keys use
+////      */
+////     constructor(options = {}) {}
+//// }
+
+verify.encodedSyntacticClassificationsLength(84);