[JEXL-301] Array access operator does not fail on null object in non-strict arithmetic mode

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1
• Fix Version/s: 3.2
• Assignee: Henri Biestro
• Reporter: Dmitri Blinov
• Created: 17/May/19 08:01
• Updated: 07/Jun/21 13:14
• Resolved: 22/May/19 16:31

Description

Consider the following test cases

    @Test
    public void testNullArrayAccess() throws Exception {
        JexlEngine jexl = new JexlBuilder().arithmetic(new JexlArithmetic(false)).create();
        JexlScript s = jexl.createScript("var x = null; x[0]");
        try {
           Object o = s.execute(null);
           Assert.fail("Should have failed");
        } catch (Exception ex) {
           //
        }
    }

and

    @Test
    public void testNullArrayAccess2() throws Exception {
        JexlEngine jexl = new JexlBuilder().arithmetic(new JexlArithmetic(false)).create();
        JexlScript s = jexl.createScript("var x = [null,1]; x[0][0]");
        try {
           Object o = s.execute(null);
           Assert.fail("Should have failed");
        } catch (Exception ex) {
           //
        }
    }

I exect array access operator to work identically in both cases, i.e. we should fail on trying to get an array element of null. Nevertheless, only the second case fails. I think this is a bug.