--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/deopt/RethrowDeoptMaterializeTest.java	2019-03-09 03:56:08.876683953 +0100
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/deopt/RethrowDeoptMaterializeTest.java	2019-03-09 03:56:08.508681350 +0100
@@ -46,7 +46,7 @@
         @SuppressWarnings("sync-override")
         @Override
         public final Throwable fillInStackTrace() {
-            return null;
+            return this;
         }
     }