ClassCastException in/with nested Binary operation

[kmosakowski]

Hi,
I have been investigating the problem with ClassCastExceiton related to Binary operation.

pom.xml

<dependency>
    <groupId>org.mvel</groupId>
    <artifactId>mvel2</artifactId>
    <version>2.5.0.Final</version>
</dependency>

MVEL Code snippet:

...
if(isdef aaa){
    aaaBB = aaa;
    ccc = (aaa >> 4) & 15;
    ddd = aaa & 15;
    eee = (aaa >> 16) & 15;
    fff = (aaa >> 8) & 63;
    ggg = (aaa >> 24) & 63;
}
...

We will focus only on this line
(aaa >> 4) & 15
but the problem is with all similar lines!

In the above line we have sub statement aaa >> 4 which is executed before the whole line. In every step I highlight it

There are two steps:

Compilation step BinaryOperation.class:

1. aaa >> 4
    operation=9
    Left: ASTNode=aaa, egressType=Object
    Right: LiteralNode=4, rType=106, egressType=Integer

2. (aaa >> 4) & 15
    operation=6
    Left: Substatement=(aaa >> 4), lType=106 egressType=Integer
    Right: LiteralNode=15, rType=106, egressType=Integer

Execution step MathProcessor.class:

1. aaa >> 4
    operation=9
    type1=107
    val1:
        aaa=1086456579 Long
    val2:
        4 Integer
   
    MathProcessor.class
        if (val2 instanceof Integer) {
            return (Long)val1 >> (Integer)val2;
        }
   
    Result: 67903536

2. (aaa >> 4) & 15
    operation=6
    type1=106
    val1:
        a(aaa >> 4)aa=67903536 Long
    val2:
        15 Integer
   
    MathProcessor.class
        if (val2 instanceof Long) {     //false
            return (long)(Integer)val1 & (Long)val2;
        }

        return (Integer)val1 & (Integer)val2;
   
    Result: java.lang.ClassCastException

Is there something wrong with my MVEL code?
Can I somehow workaround it?
I assume that is a bug in MVEL library