[jira] [Created] (JEXL-436) The increment (decrement) operator does not check for null operand

[Vincent Bussol (Jira)]

Vincent Bussol created JEXL-436:
-----------------------------------

             Summary: The increment (decrement) operator does not check for 
null operand
                 Key: JEXL-436
                 URL: https://issues.apache.org/jira/browse/JEXL-436
             Project: Commons JEXL
          Issue Type: Bug
    Affects Versions: 3.4.1
            Reporter: Vincent Bussol


Using the default arithmetic (strict):

 
{code:java}
var i = null;
++i;{code}
The operation returns 1 when it should fail. Same behavior for all version of 
increment/decrement operators. The other operators (like add or self add) throw 
an error "variable 'i' is null" as expected.

 

 
{code:java}
@Test
void testStrictIncrementOperatorOnNull() {
    final JexlEngine jexl = new JexlBuilder().create();
    JexlScript script = jexl.createScript("var i = null; ++i");
    assertThrows(JexlException.class, () -> script.execute(null));
} {code}
 

 



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