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Examples of errors detected by the V757…

Examples of errors detected by the V757 diagnostic

V757. It is possible that an incorrect variable is compared with null after type conversion using 'dynamic_cast'.


LibreOffice

V757 It is possible that an incorrect variable is compared with nullptr after type conversion using 'dynamic_cast'. Check lines: 2709, 2710. menu.cxx 2709


void PopupMenu::ClosePopup(Menu* pMenu)
{
  MenuFloatingWindow* p = dynamic_cast<MenuFloatingWindow*>(ImplGetWindow());
  PopupMenu *pPopup = dynamic_cast<PopupMenu*>(pMenu);
  if (p && pMenu)
    p->KillActivePopup(pPopup);
}

Haiku Operation System

V757 It is possible that an incorrect variable is compared with nullptr after type conversion using 'dynamic_cast'. Check lines: 474, 476. recover.cpp 474


void
checkStructure(Disk &disk)
{
  ....
  Inode* missing = gMissing.Get(run);
  dir = dynamic_cast<Directory *>(missing);

  if (missing == NULL) {
    ....
  }
  ....
}

Similar errors can be found in some other places:

  • V757 It is possible that an incorrect variable is compared with nullptr after type conversion using 'dynamic_cast'. Check lines: 355, 357. ExpandoMenuBar.cpp 355
  • V757 It is possible that an incorrect variable is compared with nullptr after type conversion using 'dynamic_cast'. Check lines: 600, 601. ValControl.cpp 600

MuditaOS

V757 [CERT-EXP12-C] It is possible that an incorrect variable is compared with nullptr after type conversion using 'dynamic_cast'. Check lines: 214, 214. CallLogDetailsWindow.cpp 214


void CallLogDetailsWindow::onBeforeShow(...., SwitchData *data)
{
  ....
  if (auto switchData = dynamic_cast
                        <calllog::CallLogSwitchData *>(data); data != nullptr)
  {
    ....
  }
  ....
}

Similar errors can be found in some other places:

  • V757 [CERT-EXP12-C] It is possible that an incorrect variable is compared with nullptr after type conversion using 'dynamic_cast'. Check lines: 47, 47. PhoneNameWindow.cpp 47

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