e>vsnprintf</code>,
<code>vsprintf</code>, <code>vsscanf</code>, <code>vfwprintf</code>,
<code>vfwscanf</code>, <code>vswprintf</code>, <code>vswscanf</code>,
<code>vwprintf</code>, or <code>vwscanf</code> function is called with an
improperly initialized <code>va_list</code> argument, or
the argument is used (other than in an invocation of <code>va_end</code>)
after the function returns (7.21.6.8, 7.21.6.9, 7.21.6.10, 7.21.6.11, 7.21.6.12, 7.21.6.13, 7.21.6.14,
7.29.2.5, 7.29.2.6, 7.29.2.7, 7.29.2.8, 7.29.