From bd7328675a75d0a89574c1da4deb7e13a1fdf63a Mon Sep 17 00:00:00 2001
From: Tim Schaub <tim.schaub@gmail.com>
Date: Tue, 17 Jul 2018 14:55:10 -0600
Subject: [PATCH] Construct error with message

---
 src/ol/AssertionError.js | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/ol/AssertionError.js b/src/ol/AssertionError.js
index b1ab3ac881..293c6996ae 100644
--- a/src/ol/AssertionError.js
+++ b/src/ol/AssertionError.js
@@ -16,12 +16,10 @@ class AssertionError extends Error {
    */
   constructor(code) {
     const path = VERSION.split('-')[0];
+    const message = 'Assertion failed. See https://openlayers.org/en/' + path +
+    '/doc/errors/#' + code + ' for details.';
 
-    /**
-     * @type {string}
-     */
-    this.message = 'Assertion failed. See https://openlayers.org/en/' + path +
-        '/doc/errors/#' + code + ' for details.';
+    super(message);
 
     /**
      * Error code. The meaning of the code can be found on