App is crashing when line chart is scrolled into view and then back out.

[BrandonShega]

So I have a collection view that has 8 items arranged single row (so it basically looks like a tableview). If I scroll the line chart into view and then out my app crashes saying fatal error: unexpectedly found nil while unwrapping an Optional value

It breaks on line 519 of LineChartRenderer.swift if I follow the code it looks like it's really stemming from here:

    public func entryIndex(xIndex x: Int) -> Int
    {
        var low = 0
        var high = _yVals.count - 1
        var closest = -1

        while (low <= high)
        {
            var m = (high + low) / 2
            var entry = _yVals[m]

            if (x == entry.xIndex)
            {
                while (m > 0 && _yVals[m - 1].xIndex == x)
                {
                    m--
                }

                return m
            }

            if (x > entry.xIndex)
            {
                low = m + 1
            }
            else
            {
                high = m - 1
            }

            closest = m
        }

        return closest
    }

The only thing I can think of is _yVals is 0 but it's only crashing like this on the line chart. We have 1 line chart and 7 bar charts, is this just saying that the data set is nil?

Thanks!

[avishaan]

@BrandonShega I'm having the same issue. How did you resolve yours?