Program: 2322
Project: 2322
Buggy source:
public IOInterfacesGenerator(StateChannelApiGenerator apigen,boolean subtypes){
  super(apigen.getJob(),apigen.getGProtocolName());
  this.apigen=apigen;
  this.SUBTYPES=subtypes;
  GProtocolName fullname=apigen.getGProtocolName();
  Role self=getSelf();
  EndpointState init=this.job.getContext().getMinimisedEndpointGraph(fullname,self).init;
  generateActionAndSuccessorInterfacesAndCollectPreActions(new HashSet<>(),init);
  generateIOStateInterfacesFirstPass(new HashSet<>(),init);
  collectPreds();
  EndpointState term=EndpointState.getTerminal(init);
  ClassBuilder endsock=null;
  if (term != null) {
    endsock=(ClassBuilder)this.apigen.getType(ScribSocketGenerator.GENERATED_ENDSOCKET_NAME);
    endsock.addImports(getIOInterfacePackageName(this.gpn,self) + "String_Node_Str");
    for (    InterfaceBuilder ib : this.preds.get(term)) {
      endsock.addInterfaces(ib.getName());
      MethodBuilder mb2=addToCastMethod(ib,"String_Node_Str");
      if (mb2 != null) {
        ib.addImports(SessionApiGenerator.getStateChannelPackageName(this.gpn,self) + "String_Node_Str");
      }
    }
  }
  generateIOStateInterfacesSecondPass(new HashSet<>(),init);
  collectBranchSuccs();
  generateHandleInterfaces(new HashSet<>(),init);
  generateHandleInterfacesSecondPass(new HashSet<>(),init);
  addIOStateInterfacesToStateChannels(new HashSet<>(),init);
  if (this.SUBTYPES) {
    addSupertypeInterfaces();
  }
  if (term != null) {
    for (    InterfaceBuilder ib : this.preds.get(term)) {
      for (      MethodBuilder cast : ib.getDefaultMethods()) {
        if (!cast.getReturn().equals("String_Node_Str")) {
          MethodBuilder mb=addEndSocketToCastMethod(endsock,cast.getReturn(),"String_Node_Str");
          if (mb != null) {
            mb.addModifiers(JavaBuilder.PUBLIC);
            mb.addAnnotations("String_Node_Str");
            endsock.addImports("String_Node_Str");
          }
        }
      }
    }
    MethodBuilder mb3=addEndSocketToCastMethod(endsock,"String_Node_Str","String_Node_Str");
    if (mb3 != null) {
      mb3.addModifiers(JavaBuilder.PUBLIC);
      mb3.addAnnotations("String_Node_Str");
    }
  }
}

Fixed version (ground truth):
public IOInterfacesGenerator(StateChannelApiGenerator apigen,boolean subtypes){
  super(apigen.getJob(),apigen.getGProtocolName());
  this.apigen=apigen;
  this.SUBTYPES=subtypes;
  GProtocolName fullname=apigen.getGProtocolName();
  Role self=getSelf();
  JobContext jc=this.job.getContext();
  EndpointState init=job.minEfsm ? jc.getMinimisedEndpointGraph(fullname,self).init : jc.getEndpointGraph(fullname,self).init;
  generateActionAndSuccessorInterfacesAndCollectPreActions(new HashSet<>(),init);
  generateIOStateInterfacesFirstPass(new HashSet<>(),init);
  collectPreds();
  EndpointState term=EndpointState.getTerminal(init);
  ClassBuilder endsock=null;
  if (term != null) {
    endsock=(ClassBuilder)this.apigen.getType(ScribSocketGenerator.GENERATED_ENDSOCKET_NAME);
    endsock.addImports(getIOInterfacePackageName(this.gpn,self) + "String_Node_Str");
    for (    InterfaceBuilder ib : this.preds.get(term)) {
      endsock.addInterfaces(ib.getName());
      MethodBuilder mb2=addToCastMethod(ib,"String_Node_Str");
      if (mb2 != null) {
        ib.addImports(SessionApiGenerator.getStateChannelPackageName(this.gpn,self) + "String_Node_Str");
      }
    }
  }
  generateIOStateInterfacesSecondPass(new HashSet<>(),init);
  collectBranchSuccs();
  generateHandleInterfaces(new HashSet<>(),init);
  generateHandleInterfacesSecondPass(new HashSet<>(),init);
  addIOStateInterfacesToStateChannels(new HashSet<>(),init);
  if (this.SUBTYPES) {
    addSupertypeInterfaces();
  }
  if (term != null) {
    for (    InterfaceBuilder ib : this.preds.get(term)) {
      for (      MethodBuilder cast : ib.getDefaultMethods()) {
        if (!cast.getReturn().equals("String_Node_Str")) {
          MethodBuilder mb=addEndSocketToCastMethod(endsock,cast.getReturn(),"String_Node_Str");
          if (mb != null) {
            mb.addModifiers(JavaBuilder.PUBLIC);
            mb.addAnnotations("String_Node_Str");
            endsock.addImports("String_Node_Str");
          }
        }
      }
    }
    MethodBuilder mb3=addEndSocketToCastMethod(endsock,"String_Node_Str","String_Node_Str");
    if (mb3 != null) {
      mb3.addModifiers(JavaBuilder.PUBLIC);
      mb3.addAnnotations("String_Node_Str");
    }
  }
}