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

[Diego Correnti (JIRA)]

    [ https://issues.jboss.org/browse/JASSIST-213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925350#comment-12925350 ] 

Diego Correnti commented on JASSIST-213:
----------------------------------------

solved changing
String method ="public Object evaluate(Object owner){return owner.toString().length() <= 10;}"; 
in
String method = "public Object evaluate(Object owner){return new Boolean(owner.toString().length() <= 10);}";
                
> 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();
> 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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