Problem with asserts namespace inside goog.math.Long

With current master (f227fadb0f234cbd3c04110c1ce76abf740f283f of 28 March 2020):

The asserts namespace is used inside the function:

It is indeed loaded:

but the asserts reference inside goog.math.Long is evidently somehow not properly set up when the namespace is loaded via code near the top of that namespace that looks like: