Undefined index while rendering sticky #674
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currentStickyIndexhad undefined checks in the code even though it's type doesn't include it. I'm seeing cases in Shopify code where this value is undefined and yet a render is being attempted.This generally happens if you have a large value a currentIndex and amount of data is then reduced. Regardless, the computations gets updated soon after. It can cause a crash sometimes which this check will mitigate.