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Overflow in signed
integer division is not always harmless: for example, on CPUs of the
i386 family, dividing INT_MIN by -1 yields a SIGFPE signal
which by default terminates the program. Worse, taking the remainder
of these two values typically yields the same signal on these CPUs,
even though the C standard requires INT_MIN % -1 to yield zero
because the expression does not overflow.