diff -u b/core/misc/drupal.js b/core/misc/drupal.js
--- b/core/misc/drupal.js
+++ b/core/misc/drupal.js
@@ -53,11 +53,11 @@
   /**
    * Helper to rethrow errors asynchronously.
    *
-   * This way Exceptions bubbles up outside of the original callstack, making
+   * This way Errors bubbles up outside of the original callstack, making it
    * easier to debug errors in the browser.
    *
-   * @param {error} error
-   * An exception object.
+   * @param {Error|string} error
+   *   The error to be thrown.
    */
   Drupal.throwError = function (error) {
     setTimeout(function () { throw error; }, 0);