It was a bug introduced in C99 -- C versions before this did not have this bug. I would say it's an extreme oversight on the part of the standardization committ

It was a bug introduced in C99 -- C versions before this did not have this bug. I would say it's an extreme oversight on the part of the standardization committee. They standard has this whimsical statement: >Where a size expression is part of the operand of a sizeof operator and changing the value of the size expression would not affect the result of the operator, it is unspecified whether or not the size expression is evaluated. I think it's a long-winded way of saying "my bad"