Using BarChartDataSet default initializer causes a crash

[natethegreat44]

Hi,
I just tried using version 2.2.1 and my app crashed. I tracked it down to initializing BarChartDataSet with the default initializer.

i.e. in swift, BarChartDataSet(), or in objc [[BarChartDataSet alloc] init]

The error is:
fatal error: unexpectedly found nil while unwrapping an Optional value

Happens on line 57 of ChartDataSet.swift:
public var yVals: [ChartDataEntry] { return _yVals }

I love this library... thank you!
Nate

[liuxuan30]

well.. You could use other init methods right now. seems _yVals is not inited if you simply call init()

[liuxuan30]

@danielgindi the init method does not initialize _yVals in init() or init(label: String?)
so either we initialize them there, or we make _yVals have default value. What do you prefer

[liuxuan30]

ah, why not use default values? same code twice.. maybe more