--- a/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/replacements/ThreadSubstitutions.java	Thu Apr 27 21:16:33 2017 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/replacements/ThreadSubstitutions.java	Fri Apr 28 02:54:05 2017 -0700
@@ -45,7 +45,7 @@
 @ClassSubstitution(Thread.class)
 public class ThreadSubstitutions {
 
-    @MethodSubstitution(isStatic = false)
+    @MethodSubstitution(isStatic = false, optional = true)
     public static boolean isInterrupted(final Thread thisObject, boolean clearInterrupted) {
         Word javaThread = CurrentJavaThreadNode.get();
         Object thread = javaThread.readObject(threadObjectOffset(INJECTED_VMCONFIG), JAVA_THREAD_THREAD_OBJECT_LOCATION);