--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/graphbuilderconf/NodePlugin.java	2019-03-09 03:57:14.305146684 +0100
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/graphbuilderconf/NodePlugin.java	2019-03-09 03:57:13.929144026 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -221,6 +221,9 @@
      * nodes) and fixed nodes must be manually {@linkplain FixedWithNextNode#setNext added} as
      * successors of {@code afterExceptionLoaded}.
      *
+     * The reason for this constraint is that when this plugin runs, it's inserting instructions
+     * into a different block than the one currently being parsed.
+     *
      * @param graph the graph being parsed
      * @param afterExceptionLoaded the last fixed node after loading the exception
      * @return the last fixed node after instrumentation