IGV: NPE in InputBlock::addNode()

Unzipping and opening the attached graph in IGV yields the following null pointer exception:

[INFO] java.lang.NullPointerException: Cannot invoke "com.sun.hotspot.igv.data.InputBlock.addNode(int)" because "block" is null
[INFO] at com.sun.hotspot.igv.servercompiler.ServerCompilerScheduler.schedulePinned(ServerCompilerScheduler.java:636)
[INFO] at com.sun.hotspot.igv.servercompiler.ServerCompilerScheduler.schedule(ServerCompilerScheduler.java:327)
[INFO] at com.sun.hotspot.igv.view.DiagramViewModel.getDiagramToView(DiagramViewModel.java:463)
[INFO] at com.sun.hotspot.igv.view.DiagramScene.update(DiagramScene.java:535)
[INFO] at com.sun.hotspot.igv.view.DiagramScene.setNewModel(DiagramScene.java:521)
[INFO] at com.sun.hotspot.igv.view.DiagramScene.<init>(DiagramScene.java:448)
[INFO] at com.sun.hotspot.igv.view.EditorTopComponent.<init>(EditorTopComponent.java:211)
[INFO] at com.sun.hotspot.igv.view.GraphViewerImplementation.view(GraphViewerImplementation.java:71)
[INFO] at com.sun.hotspot.igv.coordinator.actions.GraphOpenCookie.open(GraphOpenCookie.java:42)