Our website uses cookies to enhance your browsing experience.
Accept
to the top
close form

Fill out the form in 2 simple steps below:

Your contact information:

Step 1
Congratulations! This is your promo code!

Desired license type:

Step 2
Team license
Enterprise license
** By clicking this button you agree to our Privacy Policy statement
close form
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
* By clicking this button you agree to our Privacy Policy statement

close form
Free PVS‑Studio license for Microsoft MVP specialists
* By clicking this button you agree to our Privacy Policy statement

close form
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

close form
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

close form
check circle
Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
>
Examples of errors detected by the V587…

Examples of errors detected by the V587 diagnostic

V587. Suspicious sequence of assignments: A = B; B = A;.


Windows 8 Driver Samples

V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 2572, 2573. fileinfo.c 2573


NTSTATUS
FatSetDispositionInfo (....)
{
  ....
  TmpChar = LocalBuffer[0];
  LocalBuffer[0] = TmpChar;
  ....
}

Mozilla Firefox

V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 358, 360. nsregion.cpp 360


void nsRegion::SimplifyOutwardByArea(uint32_t aThreshold)
{
  ....
  topRects = destRect;
  bottomRects = bottomRectsEnd;
  destRect = topRects;
  ....
}

LibreOffice

V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 565, 566. tabbar.cxx 566


void TabBar::ImplGetColors(....)
{
  ....
  aTempColor = rFaceTextColor;
  rFaceTextColor = rSelectTextColor;
  rSelectTextColor = rFaceTextColor;
  ....
}

Bad swap.


Git

V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 2463, 2465. dir.c 2465


static int read_one_dir(struct read_data *rd, ....)
{
  const unsigned char *next, *data = rd->data;
  ....
  data = next;
  next = data;
  ....
}

GNU GRUB

V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 338, 339. relocator.c 339


static void free_subchunk (....)
{
  switch (subchu->type)
    {
    case CHUNK_TYPE_REGION_START:
      {
       grub_mm_region_t r1, r2, *rp;
       ....
       if (*rp)
       {
        ....
       }
       else
       {
         r1->pre_size = pre_size;
         r1->size = (r2 - r1) * sizeof (*r2);
         for (rp = &grub_mm_base; *rp; rp = &((*rp)->next))
           if ((*rp)->size > r1->size)
             break;
         r1->next = *rp;               // <=
         *rp = r1->next;               // <=
         h = (grub_mm_header_t) (r1 + 1);
         r1->first = h;
         h->next = h;
         h->magic = GRUB_MM_FREE_MAGIC;
         h->size = (r2 - r1 - 1);
       }
       ....
    }
  ....
}

EFL Core Libraries

V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 1006, 1007. ecore_x_events.c 1007


void
_ecore_x_event_handle_focus_in(XEvent *xevent)
{
  ....
   e->time = _ecore_x_event_last_time;
   _ecore_x_event_last_time = e->time;
  ....
}

Similar errors can be found in some other places:

  • V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 1050, 1051. ecore_x_events.c 1051

ORCT2

V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 1115, 1118. libopenrct2ui MouseInput.cpp 1118


void process_mouse_over(....)
{
  ....
  switch (window->widgets[widgetId].type)
  {
    case WWT_VIEWPORT:
      ebx = 0;
      edi = cursorId;                                 // <=
      // Window event WE_UNKNOWN_0E was called here,
      // but no windows actually implemented a handler and
      // it's not known what it was for
      cursorId = edi;                                 // <=
      if ((ebx & 0xFF) != 0)
      {
        set_cursor(cursorId);
        return;
      }
      break;
      ....
  }
  ....
}

CodeLite

V587 An odd sequence of assignments of this kind: A = B; B = A;. Check lines: 483, 484. SqlCommandPanel.cpp:484, SqlCommandPanel.cpp:483


wxArrayString SQLCommandPanel::ParseSql() const
{
  ....
  int startPos = 0;
  int stopPos = 0;
  ....
  startPos = stopPos;
  stopPos = startPos;
  ....
}