--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/ea/EscapeAnalysisTest.java	2019-03-09 03:56:09.380687517 +0100
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/ea/EscapeAnalysisTest.java	2019-03-09 03:56:09.012684915 +0100
@@ -293,7 +293,7 @@
         @SuppressWarnings("sync-override")
         @Override
         public final Throwable fillInStackTrace() {
-            return null;
+            return this;
         }
     }