src/java.desktop/share/classes/sun/awt/AppContext.java

@@ -523,11 +523,14 @@
                 Thread.sleep(10);
             } catch (InterruptedException e) { }
         }
 
         // Then, we stop any remaining Threads
-        this.threadGroup.stop();
+        AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
+            threadGroup.stop();
+            return null;
+        });
 
         // Next, we sleep 10ms at a time, waiting for all of the active
         // Threads in the ThreadGroup to die.
 
         startTime = System.currentTimeMillis();