Примеры ошибок, обнаруженных с помощью диагностики V1048

V1048. Variable 'foo' was assigned the same value.

ORCT2

V1048 [CWE-1164] The 'ColumnHeaderPressedCurrentState' variable was assigned the same value. libopenrct2ui CustomListView.cpp 510

void CustomListView::MouseUp(....)
{
  ....
  if (!ColumnHeaderPressedCurrentState)
  {
    ColumnHeaderPressed = std::nullopt;
    ColumnHeaderPressedCurrentState = false;
    Invalidate();
  }
}

Qt

V1048 [CWE-1164] The 'm_next[0][0]' variable was assigned the same value. qpathclipper_p.h 301

class QPathEdge
{
  ....
private:
  int m_next[2][2];
  ....
};

inline QPathEdge::QPathEdge(int a, int b)
    : flag(0)
    , windingA(0)
    , windingB(0)
    , first(a)
    , second(b)
    , angle(0)
    , invAngle(0)
{
    m_next[0][0] = -1;
    m_next[1][0] = -1;
    m_next[0][0] = -1;
    m_next[1][0] = -1;
}

Similar errors can be found in some other places:

• V1048 [CWE-1164] The 'm_next[1][0]' variable was assigned the same value. qpathclipper_p.h 302

libtorrent

V1048 The 'st.total_wanted' variable was assigned the same value. torrent.cpp 3784

void torrent::bytes_done(torrent_status& st, status_flags_t const flags) const
{
  ....
  st.total_done = 0;
  st.total_wanted_done = 0;
  st.total_wanted = m_size_on_disk;
  ....
  if (m_seed_mode || is_seed())
  {
    st.total_done = m_torrent_file->total_size() - m_padding_bytes;
    st.total_wanted_done = m_size_on_disk;
    st.total_wanted = m_size_on_disk;
    ....
    return;
  }
  else if (!has_picker())
  {
    st.total_done = 0;
    st.total_wanted_done = 0;
    st.total_wanted = m_size_on_disk;
    return;
  }
  ....
}

Ogre3D

V1048 The 'mVSOutPosition' variable was assigned the same value. OgreShaderExTriplanarTexturing.cpp 168

void TriplanarTexturing::copyFrom(....)
{
  const TriplanarTexturing& rhsTP =
    static_cast<const TriplanarTexturing&>(rhs);

  mPSOutDiffuse = rhsTP.mPSOutDiffuse;
  mPSInDiffuse = rhsTP.mPSInDiffuse;

  mVSInPosition = rhsTP.mVSInPosition;   // <=
  mVSOutPosition = rhsTP.mVSOutPosition; // <=

  mVSOutNormal = rhsTP.mVSOutNormal;
  mVSInNormal = rhsTP.mVSInNormal;
  mPSInNormal = rhsTP.mPSInNormal;

  mVSInPosition = rhsTP.mVSInPosition;   // <=
  mVSOutPosition = rhsTP.mVSOutPosition; // <=
}

A classic copy-paste typo. The same value is assigned to the member variables twice.

GPCS4

V1048 [CWE-1164] The 'retVal' variable was assigned the same value. Module.cpp 129

bool NativeModule::getSymbolInfo(....) const
{
  bool retVal = false;
  do
  {
    ....
    retVal = getLibNameFromId(libId, libs, libName);
    if (!retVal)
    {
      LOG_ERR("fail to get library name");
      break;
    }
    retVal = true;
  } while (false);
  return retVal;
}