fmt.Sprintf("%d", new(int)) prints a string of decimal digits, which appears in practice to be almost always a mistake caused by forgetting to dereference a pointer to an integer. (Is there ever a good reason to print a pointer value in decimal?)

In this case the vet check is consistent with the behavior of fmt, but arguably the vet check should be intentionally stricter than fmt (since we can't change fmt). I propose to make vet report the use of %d with a pointer as an error.

It could additionally hint the user to either dereference the pointer (if it's a pointer-to-int), or use "%d" on uintptr(unsafe.Pointer(ptr)), if the decimal string really was wanted.