src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/GraphDecoder.java

@@ -130,10 +130,11 @@
                     int[] nodeStartOffsets = new int[nodeCount];
                     for (int i = 0; i < nodeCount; i++) {
                         nodeStartOffsets[i] = encodedGraph.getStartOffset() - reader.getUVInt();
                     }
                     encodedGraph.nodeStartOffsets = nodeStartOffsets;
+                    graph.setGuardsStage((StructuredGraph.GuardsStage) readObject(this));
                 }
             } else {
                 reader = null;
                 maxFixedNodeOrderId = 0;
             }

@@ -1320,11 +1321,11 @@
     protected int readOrderId(MethodScope methodScope) {
         return methodScope.reader.getUVInt();
     }
 
     protected Object readObject(MethodScope methodScope) {
-        return methodScope.encodedGraph.getObjects()[methodScope.reader.getUVInt()];
+        return methodScope.encodedGraph.getObject(methodScope.reader.getUVInt());
     }
 
     /**
      * Removes unnecessary nodes from the graph after decoding.
      *