[MVT] vbox throws a CCE

Frederic Parain frederic.parain at oracle.com
Wed Aug 23 23:08:13 UTC 2017


Remi,

Could you send the classfile?

Thank you,

Fred

> On Aug 23, 2017, at 18:40, Remi Forax <forax at univ-mlv.fr> wrote:
> 
> When i try to execute this code:
> 
> public final class Test {
>  private final int value;
> 
>  public java.lang.String toString();
>    Code:
>       0: aload_0
>       1: getfield      #11                 // Field value:I
>       4: invokedynamic #23,  0             // InvokeDynamic #0:makeConcatWithConstants:(I)Ljava/lang/String;
>       9: areturn
> 
>  public static void main(java.lang.String[]);
>    Code:
>       0: vdefault      #27                 // class ";QTest;"
>       3: iconst_3
>       4: vwithfield    #28                 // Field ";QTest;".value:I
>       7: vstore        1
>       9: getstatic     #34                 // Field java/lang/System.out:Ljava/io/PrintStream;
>      12: vload         1
>      14: vbox          #2                  // class Test
>      17: invokevirtual #40                 // Method java/io/PrintStream.println:(Ljava/lang/Object;)V
>      20: return
> }
> 
> with this command line:
> java -Xverify:none -XX:+EnableMVT Test
> 
> i get this exception:
> Exception in thread "main" java.lang.ClassCastException: vbox not from value type
> 	at Test.main(Unknown Source)
> 
> This is not clear for me why ?
> 
> cheers,
> Rémi



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