nodejs
diff --git a/‎lib/buffer.js‎
Lines changed: 4 additions & 0 deletions b/‎lib/buffer.js‎
Lines changed: 4 additions & 0 deletions
diff --git a/‎test/parallel/test-buffer.js‎
Lines changed: 7 additions & 0 deletions b/‎test/parallel/test-buffer.js‎
Lines changed: 7 additions & 0 deletions
@@ -308,6 +308,8 @@ Buffer.byteLength = byteLength;
 Object.defineProperty(Buffer.prototype, 'parent', {
   enumerable: true,
   get: function() {
+    if (!(this instanceof Buffer))
+      return undefined;
     if (this.byteLength === 0 ||
         this.byteLength === this.buffer.byteLength) {
       return undefined;
@@ -318,6 +320,8 @@ Object.defineProperty(Buffer.prototype, 'parent', {
 Object.defineProperty(Buffer.prototype, 'offset', {
   enumerable: true,
   get: function() {
+    if (!(this instanceof Buffer))
+      return undefined;
     return this.byteOffset;
   }
 });
 
@@ -1224,3 +1224,10 @@ assert.throws(function() {
 assert.throws(function() {
   new Buffer(null);
 }, /must start with number, buffer, array or string/);
+
+
+// Test prototype getters don't throw
+assert.equal(Buffer.prototype.parent, undefined);
+assert.equal(Buffer.prototype.offset, undefined);
+assert.equal(SlowBuffer.prototype.parent, undefined);
+assert.equal(SlowBuffer.prototype.offset, undefined);