--- old/test/jdk/java/awt/BasicStroke/DashOffset.java	2019-02-08 19:47:38.527433500 +0000
+++ new/test/jdk/java/awt/BasicStroke/DashOffset.java	2019-02-08 19:47:36.855939200 +0000
@@ -29,6 +29,7 @@
 import java.awt.GraphicsEnvironment;
 import java.awt.Image;
 import java.awt.image.BufferedImage;
+import java.awt.image.IndexColorModel;
 import java.awt.image.VolatileImage;
 import java.io.File;
 import java.io.IOException;
@@ -40,7 +41,7 @@
 
 /*
  * @test
- * @bug 4469881 8217263
+ * @bug 4469881 8217263 8218682
  * @summary Verifies that dashed rectangles drawn to the screen line
  *          up with their undashed counterparts
  * @author flar
@@ -89,6 +90,9 @@
                     GraphicsEnvironment.getLocalGraphicsEnvironment()
                                        .getDefaultScreenDevice()
                                        .getDefaultConfiguration();
+            if (gc.getColorModel() instanceof IndexColorModel) {
+                return;
+            }
 
             VolatileImage vi = gc.createCompatibleVolatileImage(WIDTH, HEIGHT);
             int attempt = 0;
@@ -102,7 +106,7 @@
             }
             validate(snapshot);
         } finally {
-            if (saveImage) {
+            if (saveImage && snapshot != null) {
                 save(snapshot, "volatileImage.png");
             }
         }