Examples of errors detected by the V573 diagnostic

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

CMake

V573 Uninitialized variable 'intDir' was used. The variable was used to initialize itself. cmGlobalVisualStudio7Generator.cxx 626


std::string cmGlobalVisualStudio7Generator::WriteUtilityDepend(
  cmGeneratorTarget const* target)
{
  std::vector<std::string> configs =
    target->Target->GetMakefile()->GetGeneratorConfigs(
      cmMakefile::ExcludeEmptyConfig);
  ....
  /* clang-format on */
  std::string intDirPrefix =
    target->GetLocalGenerator()->MaybeRelativeToCurBinDir(
      cmStrCat(target->GetSupportDirectory(), '\\'));
  for (std::string const& i : configs) {
    std::string intDir = cmStrCat(intDir, i);
    ....
  }
  ....
}

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);
      ....
    }
    ....
  }
}

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;
      }
}

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));
  }
  ....
}

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

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

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: