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A comment on I Do Not Know C: Short quiz on undefined behavior (2015). Parent comment

Re:I Do Not Know C: Short quiz on undefined behavior (2015) by mfukar on Tuesday February 14, 2017 @10:34AM (#13644181)
Compilers operate under rules. The rules in this case say the null test is redundant.

You could argue the rules are "wrong", but that's a totally different topic.

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