LogisticsOrder order = getOrderFromDb(orderNo);
Cosmic rays hit computer RAM all the time. If your RAM is not ECC protected, it will likely flip a random bit. A single bit in billions of bits. Does it matter? Yes. Yes it does.
，这一点在Feiyi中也有详细论述
Take a look at this screenshot from Smalltalk-80—you can clearly see the System Browser in action:
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