Примеры ошибок, обнаруженных с помощью диагностики V573

V573. Use of uninitialized variable 'Foo'. The variable was used to initialize itself.

Multi Theft Auto

V573 Uninitialized variable 'base' was used. The variable was used to initialize itself. ceguiwindow.cpp 1858

Vector2 Window::windowToScreen(const UVector2& vec) const
{
  Vector2 base = d_parent ?
    d_parent->windowToScreen(base) + getAbsolutePosition() :
    getAbsolutePosition();
  ....
}

Similar errors can be found in some other places:

• V573 Uninitialized variable 'base' was used. The variable was used to initialize itself. ceguiwindow.cpp 1892

Firebird

V573 Uninitialized variable 'p' was used. The variable was used to initialize itself. restore.cpp 17535

void realign(....)
{
  for (....)
  {
    UCHAR* p = buffer + field->fld_offset;
    ....
    for (const burp_fld* field = relation->rel_fields;
         field; field = field->fld_next)
    {
      ....
      UCHAR* p = buffer + FB_ALIGN(p - buffer, sizeof(SSHORT));
  ....
}

Similar errors can be found in some other places:

• V573 Uninitialized variable 'q' was used. The variable was used to initialize itself. restore.cpp 17536

Word for Windows 1.1a

V573 Uninitialized variable 'sectLast' was used. The variable was used to initialize itself. print2.c 599

FPrintSummaryInfo(doc, cpFirst, cpLim)
int doc;
CP cpFirst, cpLim;
{
  int fRet = fFalse;
  int pgnFirst = vpgnFirst;
  int pgnLast = vpgnLast;
  int sectFirst = vsectFirst;
  int sectLast = sectLast;
  ....
}

This is what should have been written here: int sectLast = vsectLast;

Similar errors can be found in some other places:

• V573 Uninitialized variable 'sectLast' was used. The variable was used to initialize itself. print2.c 719

LLVM/Clang

V573 Uninitialized variable 'BytesToDrop' was used. The variable was used to initialize itself. typerecordmapping.cpp 73

static Error mapNameAndUniqueName(....) {
  ....
  size_t BytesLeft = IO.maxFieldLength();
  if (HasUniqueName) {
    ....
    if (BytesNeeded > BytesLeft) {
      size_t BytesToDrop = (BytesNeeded - BytesLeft);
      size_t DropN = std::min(N.size(), BytesToDrop / 2);
      size_t DropU = std::min(U.size(), BytesToDrop - DropN);
      ....
    }
  } else {
    size_t BytesNeeded = Name.size() + 1;
    StringRef N = Name;
    if (BytesNeeded > BytesLeft) {
      size_t BytesToDrop = std::min(N.size(), BytesToDrop); // <=
      N = N.drop_back(BytesToDrop);
    }
    error(IO.mapStringZ(N));
  }
  ....
}

Blend2D

V573 Uninitialized variable 'n' was used. The variable was used to initialize itself. pixelconverter.cpp 2210

static BLResult BL_CDECL bl_convert_multi_step(...., uint32_t w, ....)
{
  for (uint32_t y = h; y; y--) {
      uint32_t i = w;

      workOpt.origin.x = baseOriginX;
      dstData = dstLine;
      srcData = srcLine;

      while (i) {
        uint32_t n = blMin(n, intermediatePixelCount);

        srcToIntermediate(&ctx->first, intermediateData, 0,
                          srcData, srcStride, n, 1, nullptr);
        intermediateToDst(&ctx->second, dstData, dstStride,
                          intermediateData, 0, n, 1, &workOpt);

        dstData += n * dstBytesPerPixel;
        srcData += n * srcBytesPerPixel;
        workOpt.origin.x += int(n);

        i -= n;
      }
}

Microsoft PowerToys

V573 Uninitialized variable 'dpi' was used. The variable was used to initialize itself. Toolbar.cpp 112

LRESULT Toolbar::WindowProcessMessages(...., UINT msg, ....)
{
  switch (msg)
  {
    ....
    case WM_DPICHANGED:
    {
      UINT dpi = LOWORD(dpi);
      ....
    }
    ....
  }
}