test/lib/testlibrary/jdk/testlibrary/Platform.java

@@ -56,11 +56,11 @@
     public static boolean isEmbedded() {
         return vmName.contains("Embedded");
     }
 
     public static boolean isTieredSupported() {
-        return compiler.contains("Tiered Compilers");
+        return compiler != null && compiler.contains("Tiered Compilers");
     }
 
 
     public static boolean is32bit() {
         return dataModel.equals("32");