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Examples of errors detected by the V570…

Examples of errors detected by the V570 diagnostic

V570. Variable is assigned to itself.


Qt

V570 The 'transition->m_hasGetterSetterProperties' variable is assigned to itself. QtScript structure.cpp 512


PassRefPtr<Structure> Structure::
  getterSetterTransition(Structure* structure)
{
  ....
  RefPtr<Structure> transition =
    create(structure->storedPrototype(), structure->typeInfo());
  transition->m_propertyStorageCapacity =
    structure->m_propertyStorageCapacity;
  transition->m_hasGetterSetterProperties =      // <=
    transition->m_hasGetterSetterProperties;
  transition->m_hasNonEnumerableProperties =
    structure->m_hasNonEnumerableProperties;
  transition->m_specificFunctionThrashCount =
    structure->m_specificFunctionThrashCount;
  ....
}

A critical initialization error: transition->m_hasGetterSetterProperties = transition->m_hasGetterSetterProperties.


ReactOS

V570 The 'mii->cch' variable is assigned to itself. user32 menu.c 4347


BOOL WINAPI GetMenuItemInfoA(....)
{
  ....
  mii->cch = mii->cch;
  ....
}

Looks like a misprint. The code should look like this: mii->cch = miiW->cch;


Quake-III-Arena

V570 The 'p->org[0]' variable is assigned to itself. cgame cg_marks.c 1267


void CG_ParticleSnowFlurry (qhandle_t pshader, centity_t *cent)
{
  ....
  p->org[0] = p->org[0];
  p->org[1] = p->org[1];
  p->org[2] = p->org[2];
  ....
}

OpenCV

V570 The 'stereo.fundMatr[i]' variable is assigned to itself. calibfilter.cpp 339


typedef struct CvStereoCamera
{
 ....
 float fundMatr[9]; /* fundamental matrix */
 ....
};

CvStereoCamera stereo;

void CvCalibFilter::Stop( bool calibrate )
{
  ....
  for( i = 0; i < 9; i++ )
  {
    stereo.fundMatr[i] = stereo.fundMatr[i];
  }
  ....
}

OpenCV

V570 The 'xyD[r]' variable is assigned to itself. test_imgwarp_strict.cpp 560


void CV_Resize_Test::resize_1d(....)
{
  ....
  for (int r = 0; r < cn; ++r)
  {
    xyD[r] = 0;
    for (int k = 0; k < ksize; ++k)
      xyD[r] += w[k] * xyS[k * cn + r];
    xyD[r] = xyD[r];
  }
  ....
}

OpenCV

V570 The 'sizes[INPUT][0].height' variable is assigned to itself. test_math.cpp 1356


void Core_DetTest::get_test_array_types_and_sizes(....)
{
  ....
  sizes[INPUT][0].width =
    sizes[INPUT][0].height = sizes[INPUT][0].height;
  ....
}

ReactOS

V570 The 'pUserColorControl->dwFlags' variable is assigned to itself. gdientry.c 1029


DWORD WINAPI
DdGetDriverInfo(LPDDHAL_GETDRIVERINFODATA pData)
{
  ....
  pUserColorControl->dwFlags = pUserColorControl->dwFlags;
  ....
}

Similar errors can be found in some other places:

  • V570 The 'Irp->IoStatus.Information' variable is assigned to itself. hidclass.c 461

VirtualDub

V570 The 'this->hic' variable is assigned to itself. Riza w32videocodecpack.cpp 253


void VDVideoCompressorVCM::Start(const void *inputFormat,
                                 uint32 inputFormatSize,
                                 const void *outputFormat,
                                 uint32 outputFormatSize,
                                 const VDFraction& frameRate,
                                 VDPosition frameCount)
{
  this->hic    = hic;
  ....
}

Coin3D

V570 The 'v0[0]' variable is assigned to itself. sotext3.cpp 1158


void
SoText3P::generate(....)
{
  ....
  v0[0] = v0[0];
  ....
}

Similar errors can be found in some other places:

  • V570 The 'v0[1]' variable is assigned to itself. sotext3.cpp 1159
  • V570 The 'v1[0]' variable is assigned to itself. sotext3.cpp 1160
  • V570 The 'v1[1]' variable is assigned to itself. sotext3.cpp 1161
  • And 4 additional diagnostic messages.

CryEngine 3 SDK

V570 The 'modifiedSlopeNormal.z' variable is assigned to itself. playerstateground.cpp 227


void CPlayerStateGround::OnPrePhysicsUpdate(....)
{
  ....
  modifiedSlopeNormal.z = modifiedSlopeNormal.z;
  ....
}

Unreal Engine 4

V570 The 'ResolveParams.CubeFace' variable is assigned to itself. rhi.h 1279


enum ECubeFace;
ECubeFace CubeFace;

friend FArchive& operator<<(
  FArchive& Ar,FResolveParams& ResolveParams)
{
  ....
  if(Ar.IsLoading())
  {
    ResolveParams.CubeFace = (ECubeFace)ResolveParams.CubeFace;
  }
  ....
}

TortoiseGit

V570 The 'blame->path' variable is assigned to itself. blame.c 319


static int blame_internal(git_blame *blame)
{
  ....
  blame->ent = ent;
  blame->path = blame->path;
  ....
}

Chromium

V570 The 'tmp_rect.right' variable is assigned to itself. text_store.cc 320


STDMETHODIMP TextStore::GetTextExt(....) {
  ....
  tmp_rect.right = tmp_rect.right;
  ....
}

OpenJPEG

V570 The 'p_stream->m_current_data' variable is assigned to itself. cio.c 675


OPJ_SIZE_T opj_stream_write_skip (
  opj_stream_private_t * p_stream, ....)
{
  ....
  if (!l_is_written)
  {
    p_stream->m_status |= opj_stream_e_error;
    p_stream->m_bytes_in_buffer = 0;
    p_stream->m_current_data = p_stream->m_current_data;
    return (OPJ_SIZE_T) -1;
  }
  ....
}

Linux Kernel

V570 The 'acx->window_size' variable is assigned to itself. acx.c 1728


int wl12xx_acx_config_hangover(struct wl1271 *wl)
{
  ....
  acx->recover_time = cpu_to_le32(conf->recover_time);
  acx->hangover_period = conf->hangover_period;
  acx->dynamic_mode = conf->dynamic_mode;
  acx->early_termination_mode = conf->early_termination_mode;
  acx->max_period = conf->max_period;
  acx->min_period = conf->min_period;
  acx->increase_delta = conf->increase_delta;
  acx->decrease_delta = conf->decrease_delta;
  acx->quiet_time = conf->quiet_time;
  acx->increase_time = conf->increase_time;
  acx->window_size = acx->window_size;         // <=
  ....
}

FreeCAD

V570 The 'this->quat[3]' variable is assigned to itself. rotation.cpp 260


Rotation & Rotation::invert(void)
{
  this->quat[0] = -this->quat[0];
  this->quat[1] = -this->quat[1];
  this->quat[2] = -this->quat[2];
  this->quat[3] =  this->quat[3];
  return *this;
}

GNU Octave

V570 The 'i' variable is assigned to itself. sparse.cc 144


template <class T>
void Sparse<T>::SparseRep::maybe_compress(bool remove_zeros)
{
  ....
  octave_idx_type i = 0;
  for (octave_idx_type j = 1; j <= ncols; j++)
  {
    octave_idx_type u = c[j];
    for (i = i; i < u; i++)            // <=
      if (d[i] != T())
      {
        d[k] = d[i];
        r[k++] = r[i];
      }
    c[j] = k;
  }
 ....
}

Similar errors can be found in some other places:

  • V570 The 'i' variable is assigned to itself. sparse.cc 967

FreeSWITCH

V570 The variable is assigned to itself. skypopen_protocol.c 1512


struct SkypopenHandles {
  HWND win32_hInit_MainWindowHandle;
  HWND win32_hGlobal_SkypeAPIWindowHandle;
  ....
};

LRESULT APIENTRY skypopen_present(...., WPARAM uiParam, ....)
{
 ....
 if (!tech_pvt->SkypopenHandles.currentuserhandle) {
   tech_pvt->SkypopenHandles.api_connected = 1;
   tech_pvt->SkypopenHandles.win32_hGlobal_SkypeAPIWindowHandle =
    (HWND) uiParam;
   tech_pvt->SkypopenHandles.win32_hGlobal_SkypeAPIWindowHandle =
    tech_pvt->SkypopenHandles.win32_hGlobal_SkypeAPIWindowHandle;
 }
 ....
}

Unreal Engine 4

V570 The 'Position' variable is assigned to itself. drawelements.h 435


class FSlateDrawElement
{
  ....
  FORCEINLINE void SetPosition(const FVector2D& InPosition)
  { Position = Position; }
  ....
  FVector2D Position;
  ....
};

ChakraCore

V570 The 'this->isInlined' variable is assigned to itself. functioncodegenjittimedata.h 625


void SetupRecursiveInlineeChain(
    Recycler *const recycler,
    const ProfileId profiledCallSiteId)
{
  if (!inlinees)
  {
    inlinees = RecyclerNewArrayZ(....);
  }
  inlinees[profiledCallSiteId] = this;
  inlineeCount++;
  this->isInlined = isInlined;   // <=
}

Similar errors can be found in some other places:

  • V570 The 'sym->m_isTaggableIntConst' variable is assigned to itself. linearscan.cpp 3170

FreeBSD Kernel

V570 The 'lenRecv' variable is assigned to itself. itdinit.c 271


osGLOBAL void
itdssGetOperatingOptionParams(....)
{
  ....
  /* to remove compiler warnings */
  pLastUsedChar   = pLastUsedChar;
  lenRecv         = lenRecv;
  subkey2         = subkey2;
  subkey1         = subkey1;
  key             = key;
  buffer          = &tmpBuffer[0];
  buffLen         = sizeof (tmpBuffer);
  ....
}

Oracle VM Virtual Box

V570 The 'from->eval1D[i].u1' variable is assigned to itself. state_evaluators.c 1006


void
crStateEvaluatorDiff(CREvaluatorBits *e, CRbitvalue *bitID,
                     CRContext *fromCtx, CRContext *toCtx)
{
  ....
  from->eval1D[i].order = to->eval1D[i].order;
  from->eval1D[i].u1 = from->eval1D[i].u1;
  from->eval1D[i].u2 = from->eval1D[i].u2;
  ....
}

Similar errors can be found in some other places:

  • V570 The 'from->eval1D[i].u2' variable is assigned to itself. state_evaluators.c 1007
  • V570 The 'from->eval2D[i].u1' variable is assigned to itself. state_evaluators.c 1042
  • V570 The 'from->eval2D[i].u2' variable is assigned to itself. state_evaluators.c 1043
  • And 2 additional diagnostic messages.

The GTK+ Project

V570 The 'tmp_info' variable is assigned to itself. gtkimcontextxim.c 442


static GtkXIMInfo *
get_im (....)
{
  ....
  GtkXIMInfo *info;
  ....
  info = NULL;
  tmp_list = open_ims;
  while (tmp_list)
    {
      ....
      else
        {
          tmp_info = tmp_info;
          break;
        }
      ....
    }
  if (info == NULL)
    {
      ....
    }
  ....
}

ReactOS

V570 The 'idButton' variable is assigned to itself. mainwindow.cpp 546


LRESULT CDeviceManager::OnNotify(_In_ LPARAM lParam)
{
  ....
  UINT_PTR idButton = lpttt->hdr.idFrom;
  switch (idButton)
  {
    ....
  }
  idButton = idButton;
  ....
}

Open X-Ray Engine

V570 The 'value[0]' variable is assigned to itself. compiler_cover.cpp 260


void compute_cover_value (....)
{
  ....
  float    value    [8];
  ....
  if (value[0] < .999f) {
    value[0] = value[0];
  }
  ....
}

CryEngine V

V570 The 'runtimeData.entityId' variable is assigned to itself. behaviortreenodes_ai.cpp 1771


void ExecuteEnterScript(RuntimeData& runtimeData)
{
  ExecuteScript(m_enterScriptFunction, runtimeData.entityId);

  runtimeData.entityId = runtimeData.entityId;
  runtimeData.executeExitScriptIfDestructed = true;
}

Steinberg SDKs

V570 The same value is assigned twice to the 'lpf' variable. mdaComboProcessor.cpp 274


void ComboProcessor::recalculate ()
{
  ....
  case 4: trim = 0.96f; lpf = filterFreq(1685.f);
      mix1 = -0.85f; mix2 = 0.41f;
      del1 = int (getSampleRate () / 6546.f);
      del2 = int (getSampleRate () / 3315.f);
      break;

  case 5: trim = 0.59f; lpf = lpf = filterFreq(2795.f); // <=
      mix1 = -0.29f; mix2 = 0.38f;
      del1 = int (getSampleRate () / 982.f);
      del2 = int (getSampleRate () / 2402.f);
      hpf = filterFreq(459.f);
      break;
  ....
}

Amazon Lumberyard

V570 The 'behaviorParams.ignoreOnVehicleDestroyed' variable is assigned to itself. vehiclecomponent.cpp 168


bool CVehicleComponent::Init(....)
{
  ....
  if (!damageBehaviorTable.getAttr(....)
  {
    behaviorParams.ignoreOnVehicleDestroyed = false;
  }
  else
  {
    behaviorParams.ignoreOnVehicleDestroyed =
      behaviorParams.ignoreOnVehicleDestroyed;
  }
  ....
}
bValue = !bValue

Azure Service Fabric

V570 The 'statusDetails_' variable is assigned to itself. ComposeDeploymentStatusQueryResult.cpp 49


ComposeDeploymentStatusQueryResult &
ComposeDeploymentStatusQueryResult::operator = (
  ComposeDeploymentStatusQueryResult && other)        // <=
{
  if (this != & other)
  {
    deploymentName_ = move(other.deploymentName_);
    applicationName_ = move(other.applicationName_);
    dockerComposeDeploymentStatus_ = move(other....);
    statusDetails_ = move(statusDetails_);            // <=
  }

  return *this;
}

Vangers: One For The Road

V570 The same value is assigned twice to the 'ExternalSensor' variable. mechos.cpp 5828


struct VangerUnit : TrackUnit, uvsUnitType, aiFactorType
{
  ....
  int ExternalMode, ExternalTime, ExternalLock,
      ExternalDraw, ExternalAngle;
  int ExternalTime2;
  SensorDataType *ExternalObject;
  SensorDataType *ExternalLastSensor;
  SensorDataType *ExternalSensor;
  int RandomUpdate;
  ....
};

void VangerUnit::CreateVangerUnit(void)
{
  ....
  DoorFlag = 0;
  ExternalMode = EXTERNAL_MODE_NORMAL;
  ExternalTime = 0;
  ExternalLock = 0;
  ExternalDraw = 1;
  ExternalObject = ExternalSensor = ExternalSensor = NULL; // <=
  ExternalTime2 = 0;
  ExternalAngle = 0;
  Go2World();
  ....
};

Similar errors can be found in some other places:

  • V570 The same value is assigned twice to the 'ExternalSensor' variable. mechos.cpp 13967

0 A.D.

V570 The 'ptr' variable is assigned to itself. FUTracker.h 122


FUTrackedPtr(ObjectClass* _ptr = NULL) : ptr(_ptr)
{
  if (ptr != NULL) FUTracker::TrackObject((FUTrackable*) ptr);
  ptr = ptr;
}

NCBI Genome Workbench

V570 The 'm_onClickFunction' variable is assigned to itself. alngraphic.hpp 103


void SetOnClickFunctionName(string onClickFunction) {
  m_onClickFunction = m_onClickFunction;
}

Similar errors can be found in some other places:

  • V570 The 'iter->level' variable is assigned to itself. align_format_util.cpp 189
  • V570 The 'd_elements_values[ind]' variable is assigned to itself. sls_alp_data.cpp 1416

LLVM/Clang

V570 The 'Identifier->Type' variable is assigned to itself. FormatTokenLexer.cpp 249


bool FormatTokenLexer::tryMergeCSharpNullConditionals() {
  ....
  auto &Identifier = *(Tokens.end() - 2);
  auto &Question = *(Tokens.end() - 1);
  ....
  Identifier->ColumnWidth += Question->ColumnWidth;
  Identifier->Type = Identifier->Type;
  Tokens.erase(Tokens.end() - 1);
  return true;
}

Haiku Operation System

V570 The 'wPipeIndex' variable is assigned to itself. CEchoGals_transport.cpp 244


ECHOSTATUS CEchoGals::CloseAudio (....)
{
  ....
  wPipeIndex = wPipeIndex;
  m_ProcessId[ wPipeIndex ] = NULL;
  m_Pipes[ wPipeIndex ].wInterleave = 0;
  ....
}

Heawei Ark Compiler

V570 The 'theDoubleVal' variable is assigned to itself. lexer.cpp 283


int64 theIntVal = 0;
float theFloatVal = 0.0;
double theDoubleVal = 0.0;

TokenKind MIRLexer
::GetFloatConst(uint32 valStart, uint32 startIdx, bool negative) {
  ....
  theIntVal = static_cast<int>(theFloatVal);
  theDoubleVal = static_cast<double>(theDoubleVal);
  if (theFloatVal == -0) {
    theDoubleVal = -theDoubleVal;
  }
  ....
}

GCC

V570 The 'ctx->outer_reduction_clauses' variable is assigned to itself. omp-low.c 935


static omp_context *
new_omp_context (gimple *stmt, omp_context *outer_ctx)
{
  omp_context *ctx = XCNEW (omp_context);

  splay_tree_insert (all_contexts, (splay_tree_key) stmt,
         (splay_tree_value) ctx);
  ctx->stmt = stmt;

  if (outer_ctx)
    {
      ctx->outer = outer_ctx;
      ctx->cb = outer_ctx->cb;
      ctx->cb.block = NULL;
      ctx->local_reduction_clauses = NULL;
      ctx->outer_reduction_clauses = ctx->outer_reduction_clauses;  // <=
      ctx->depth = outer_ctx->depth + 1;
    }
  ....
}

Command & Conquer

V570 The 'hdr->MagicNumber' variable is assigned to itself. COMBUF.CPP 806


struct CommHdr {
  unsigned short MagicNumber;
  unsigned char Code;
  unsigned long PacketID;
} *hdr;

void CommBufferClass::Mono_Debug_Print(int refresh)
{
  ....
  hdr = (CommHdr *)SendQueue[i].Buffer;
  hdr->MagicNumber = hdr->MagicNumber;
  hdr->Code = hdr->Code;
  ....
}

Similar errors can be found in some other places:

  • V570 The 'hdr->Code' variable is assigned to itself. COMBUF.CPP 807
  • V570 The 'hdr->MagicNumber' variable is assigned to itself. COMBUF.CPP 931
  • V570 The 'hdr->Code' variable is assigned to itself. COMBUF.CPP 932
  • And 10 additional diagnostic messages.

Storm Engine

V570 The 'Data_num' variable is assigned to itself. s_stack.cpp 36


uint32_t Data_num;
....
DATA *S_STACK::Push(....)
{
  if (Data_num > 1000)
  {
    Data_num = Data_num;
  }
  ....
}

TheXTech

V570 The 'NPC[A].Location.X' variable is assigned to itself. thextech npc_hit.cpp 1995


else
{
  NPC[A].Location.Y = NPC[A].Location.Y + NPC[A].Location.Height;
  NPC[A].Location.X = NPC[A].Location.X; // - (32 - .Location.Width) / 2
  ....
}

Ogre3D

V570 Variable is assigned to itself. OgreETCCodec.cpp 242


bool ETCCodec::decodePKM(const DataStreamPtr& stream,
                         DecodeResult& result) const
{
  // ....
  void *destPtr = output->getPtr();
  stream->read(destPtr, imgData->size);
  destPtr = static_cast<void*>(static_cast<uchar*>(destPtr)); // <=
  // ....
}

The destPtr pointer is cast to another pointer type, then to its own type, and is assigned to itself. A very strange place. Perhaps this is an old code that the developers forgot to remove.


Captain Blood

V570 [CWE-480] The 'ldMaxChars' variable is assigned to itself. StringAttr.cpp 198


void StringAttribute::LoadFromFile (....)
{
  int ldMinChars, ldMaxChars;
  // ....
  minChars = ldMinChars;
  ldMaxChars = ldMaxChars;
  // ....
}

class StringAttribute : public BaseAttribute
{
  int minChars;
  int maxChars;
}

Blender

V570 [CWE-480] The 'gps_dst->fill_opacity_fac' variable is assigned to itself. gpencil_legacy.cc 1029


void BKE_gpencil_stroke_copy_settings(const bGPDstroke *gps_src,
                                      bGPDstroke *gps_dst)
{
  gps_dst->thickness = gps_src->thickness;
  gps_dst->flag = gps_src->flag;
  gps_dst->inittime = gps_src->inittime;
  gps_dst->mat_nr = gps_src->mat_nr;
  copy_v2_v2_short(gps_dst->caps, gps_src->caps);
  gps_dst->hardness = gps_src->hardness;
  copy_v2_v2(gps_dst->aspect_ratio, gps_src->aspect_ratio);
  gps_dst->fill_opacity_fac = gps_dst->fill_opacity_fac;     // <=
  copy_v3_v3(gps_dst->boundbox_min, gps_src->boundbox_min);
  copy_v3_v3(gps_dst->boundbox_max, gps_src->boundbox_max);
  gps_dst->uv_rotation = gps_src->uv_rotation;
  copy_v2_v2(gps_dst->uv_translation, gps_src->uv_translation);
  gps_dst->uv_scale = gps_src->uv_scale;
  gps_dst->select_index = gps_src->select_index;
  copy_v4_v4(gps_dst->vert_color_fill, gps_src->vert_color_fill);
}

Blender

V570 [CWE-480] The 'data->use_temp_uniform' variable is assigned to itself. cage2d_gizmo.cc 1094


static int gizmo_cage2d_modal(....)
{
  ....
  if ((transform_flag & ED_GIZMO_CAGE_XFORM_FLAG_SCALE_UNIFORM) == 0)
  {
    const bool use_temp_uniform = (event->modifier & KM_SHIFT) != 0;
    const bool changed = data->use_temp_uniform != use_temp_uniform;
    data->use_temp_uniform = data->use_temp_uniform;
    ....
  }
  ....
}

Blender

V570 [CWE-480] The same value is assigned twice to the 'value' variable. interface.cc 2676


void ui_but_value_set(uiBut *but, double value)
{
  ....
    if (but->editval) {
      value = *but->editval = value;
    }
    else
    ....
  ui_but_update_select_flag(but, &value);
}

LLVM/Clang

V570 The 'C' variable is assigned to itself. MapLattice.h:52


template <typename Key, typename ElementLattice> class MapLattice {
  using Container = llvm::DenseMap<Key, ElementLattice>;
  Container C;

public:
  ....
  explicit MapLattice(Container C) { C = std::move(C); }
  ....
}

x64dbg

V570 The 'mLastChar' variable is assigned to itself. lexer.cpp 149


class Lexer
{
....
private:
  ....
  int mLastChar = ' ';
  ....
....
}

Lexer::Token Lexer::getToken()
{
  ....
  if(mLastChar == '\\') //escape sequence
  {
    nextChar();
    if(mLastChar == EOF)
      return reportError("unexpected end of file in character literal (2)");
    if(mLastChar == '\r' || mLastChar == '\n')
      return reportError("unexpected newline in character literal (2)");
    if(   mLastChar == '\'' || mLastChar == '\"'
       || mLastChar == '?' || mLastChar == '\\')
      mLastChar = mLastChar;                                   // <=
    else if(mLastChar == 'a')
      mLastChar = '\a';
    ....
  }
  ....
}

Similar errors can be found in some other places:

  • V570 The 'mLastChar' variable is assigned to itself. lexer.cpp 215

LLVM/Clang

V570 The 'C' variable is assigned to itself. MapLattice.h 52


template <typename Key, typename ElementLattice> class MapLattice {
  using Container = llvm::DenseMap<Key, ElementLattice>;
  Container C;
public:
  ....
  explicit MapLattice(Container C) { C = std::move(C); }
  ....
}

Xenia

V570 The 'extent.depth' variable is assigned to itself. texture_extent.cc 58


static TextureExtent CalculateExtent(const FormatInfo* format_info,
                                     uint32_t pitch, uint32_t height,
                                     uint32_t depth, bool is_tiled,
                                     bool is_guest)
{
  TextureExtent extent;
  extent.depth = depth;
  if (is_guest)
  {
    ....
    // Is depth special?
    extent.depth = extent.depth;
  }

  return extent;
}