Limit for code lines?

Could it be that there is a limit of how many function calls can be executed? Or a limit for lines of code that can be executed on each onUpdate? If so can I somewhere check this?

I have a case where following fails:

var data = getData();

function getData() {
    // some code lines...
    // ... all documented...
    // ....
    return [0.0, 1.0];
}

But if I change it to following:

var data = [0.0, 1.0]; // getData();

function getData() {
    return [0.0, 1.0];
}

Everything works. BUT I have to delete the lines inside getData, if I only document them out it does not work!

I get a stack overflow exception as soon as I call getData the second time like following (without going into the function):

Error: Stack Overflow Error
Details: Failed invoking <symbol>
Stack: 
...