[jboss-user] [Javassist] - Verify Error: Inconsistent args_size for opc_invokeinterface

kingpin do-not-reply at jboss.com
Mon Jan 10 02:24:41 EST 2011

kingpin [http://community.jboss.org/people/kingpin] created the discussion

"Verify Error: Inconsistent args_size for opc_invokeinterface"

To view the discussion, visit: http://community.jboss.org/message/579700#579700

I have been trying to generate some dynamic codes (Using Javassist) but program fails at a certain point when involving a double array or float array. The code is as follows
 Class c = Customers.class; // called in main & Customer class just has a double[] Dubs = new double[10]
CreateType(c); // Main
public static Object CreateType(Class genericType)
        // some preReq declarations
        CtMethod writeCode = dyn.getDeclaredMethod("processCode");
        generateCode(genericType, Code, "temp"); // Code is a StringBuilder class
        writeCode.insertAt(1, Code.toString()); // Compilation is successful
        Class c = dyn.toClass();
        Dynamic h;
        Constructor[] ctorlist = null;
        ctorlist =  c.getDeclaredConstructors(); // Problem is here
        h = (DynamicSurrogate) ctorlist[0].newInstance(genericType);
        return h;

Generated code is as follows

 testapp1.Customers temp=(testapp1.Customers)graph;


But problem arises when getDeclaredConstructors is called c.getDeclaredConstructors() ... it throws the following error
Exception in thread "main" java.lang.VerifyError: (class: testapp1/Dyn, method: processDouble signature: (Lsomething/Output;Ljava/lang/Object;)V) Inconsistent args_size for opc_invokeinterface
A workaround exists but does not make any sense, i.e. everything works fine if i simply create a copy of the double array and pass it on to processDouble in dynamic codei.e. if the dynamic code is 

 testapp1.Customers temp=(testapp1.Customers)graph;
    double[] d = temp.Dubs;


n short , exception Unhandled is thrown by getDeclaredConstructor but it actually has nothing to do with a constructor because it doesnt matter if i create one or not
Hopefully my problem and code is clear enough, if any confusion please do tell, Thankyou in advance  :)

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