warning C6334: sizeof operator applied to an expression with an operator may yield unexpected results
This warning indicates a misuse of the sizeof operator. The sizeof operator, when applied to an expression, yields the size of the type of the resulting expression.
For example, in the following code:
char a; size_t x; x = sizeof (a - 1);
x will be assigned the value 4, not 9, because the resulting expression is no longer a pointer to the array a, but simply a pointer.