tracker issue : CF-4205758

Problem Description:

The following code (or any code using the array slice syntax in an lexically scoped inner function) causes an error:

> Incompatible object argument for function call

{code}
function foo3() {
    var data = [1,2,3];
    return function() {
        return data[::-1];
    }
}
{code}

Steps to Reproduce:

Run the following code:

{code}
function foo1() {
    var data = [1,2,3];
    return data[::-1]; // this is fine
}

function foo2() {
    var data = [1,2,3];
    return function() {
        return data; // this is fine
    }
}

function foo3() {
    var data = [1,2,3];
    return function() {
        // this causes compiler error
        return data[::-1];
    }
}

writeDump(foo1());
writeDump(foo2()());
writeDump(foo3()());
{code}

Here's a fiddle:
https://cffiddle.org/app/file?filepath=0f0206b9-24d2-4146-a52d-2293a338fbb0/6127d524-4c0a-4e84-bd4d-a770b8d5b552/9809585d-00aa-483b-99c4-ca8218e00e77.cfm

Actual Result:

(class: cftmp_cfd91c2b2db5782d47b42d881a2dee6b051c7eda2ecfm1767426690$func_CF_ANONYMOUSCLOSURE_726, method: runFunction signature: (Lcoldfusion/runtime/LocalScope;Ljava/lang/Object;Lcoldfusion/runtime/CFPage;Lcoldfusion/runtime/ArgumentCollection;)Ljava/lang/Object;) Incompatible object argument for function call

Expected Result:

Should return an array (reversed in this example but that's not important - it's the syntax that is the issue)

Any Workarounds:

Not really. You could use arraySlice function, but that doesn't allow you as many options.

Attachments:

Comments: