[jboss-jira] [JBoss JIRA] (JASSIST-213) jvmvrfy012 stack shape inconsistent

[Diego Correnti (JIRA)]

Diego Correnti created JASSIST-213:
--------------------------------------

             Summary: jvmvrfy012 stack shape inconsistent
                 Key: JASSIST-213
                 URL: https://issues.jboss.org/browse/JASSIST-213
             Project: Javassist
          Issue Type: Bug
    Affects Versions: 3.16.1-GA
            Reporter: Diego Correnti
            Assignee: Shigeru Chiba
            Priority: Critical


I get jvmvrfy012 stack shape inconsistent from this code:


String method ="public Object evaluate(Object owner){return owner.toString().length() <= 10;}";
ClassPool pool = ClassPool.getDefault();
pool.insertClassPath(new ClassClassPath(CodeInjector.class));
CtClass newClass = pool.makeClass("MyExpression");
newClass.setInterfaces(new CtClass[] {pool.get("magnum.commands.IExpression")});	
CtMethod newmethod = CtNewMethod.make(method,newClass);
newClass.addMethod(newmethod);
Class<?> cClass = newClass.toClass();
Object snippet = cClass.newInstance();



public interface IExpression<TypeIn,TypeOut> 
{
	TypeOut evaluate(TypeIn owner);
}



Caused by: java.lang.VerifyError: JVMVRFY012 forma stack non coerente; classe=MyExpression, metodo=evaluate(Ljava/lang/Object;)Ljava/lang/Object;, pc=17
	at java.lang.J9VMInternals.verifyImpl(Native Method)
	at java.lang.J9VMInternals.verify(J9VMInternals.java:72)
	at java.lang.J9VMInternals.initialize(J9VMInternals.java:134)
	at java.lang.J9VMInternals.newInstanceImpl(Native Method)
	at java.lang.Class.newInstance(Class.java:1325)


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