src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/ea/EscapeAnalysisTest.java

@@ -291,11 +291,11 @@
         }
 
         @SuppressWarnings("sync-override")
         @Override
         public final Throwable fillInStackTrace() {
-            return null;
+            return this;
         }
     }
 
     @Test
     public void testMergeAllocationsException() {