[JEXL-271] Hoisted variable is lost when currying lambda

• 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: 30/Aug/18 12:41
• Updated: 07/Jun/21 13:14
• Resolved: 10/Sep/18 13:39

Description

I have noticed that when I curry the lambda that contains hoisted variable, then binding to that variable is lost when I call curried lambda. The following test case illustrates the problem

    @Test
    public void testCurry4() throws Exception {
        JexlEngine jexl = new JexlBuilder().strict(false).create();
        JexlScript base = jexl.createScript("var base = 2; var sum = (x, y, z)->{ base + x + y + z }; var y = sum.curry(1); y(2,3)");
        Object result = base.execute(null);
        Assert.assertEquals(8, result);
    }

To put it another way, the following script returns 2 when it should return 0;

var base = 2; var sum = (x, y, z)->{ base + x + y + z }; var y = sum.curry(1); sum(1, 2, 3) - y(2,3)