QString::toWCharArray hits Intel diagnostic #111 statement is unreachable

Qt\5.6.1\include\QtCore/qstring.h(961): warning #111: statement is unreachable
      return toUcs4_helper(d->data(), size(), reinterpret_cast<uint *>(array));
      ^

QT_WARNING_PUSH
QT_WARNING_DISABLE_MSVC(4127)   // "conditional expression is constant"

inline int QString::toWCharArray(wchar_t *array) const
{
    if (sizeof(wchar_t) == sizeof(QChar)) {
        memcpy(array, d->data(), sizeof(QChar) * size());
        return size();
    }
    return toUcs4_helper(d->data(), size(), reinterpret_cast<uint *>(array));
}

QT_WARNING_POP