Binary search is also helpful in code that doesn’t reliably produce useful stack traces (side eyes Promise.then). Comment out half of the potentially implicated

Binary search is also helpful in code that doesn’t reliably produce useful stack traces (side eyes Promise.then). Comment out half of the potentially implicated code. If you get the same error, you very likely haven’t found a stack frame. If you get a different error or no error at all, keep halving until you either isolate the thing or know where to look.