Subsequent closing of windows results in small untitled icons in launcher

[Bernard Decock]

I have an application that creates and destroys a large amount of windows. If a lot of windows have to be closed simultaneously, then a number of "untitled window"-icons remain in the launcher. These icons can't be removed from the launcher until you log off.

Here's a code-snippet underneath which produces this behaviour:

#include <opencv/highgui.h> // includes highGUI definitions

int main(int argc, char *argv[])
{
  const int PlayDelay = 500; // msec
  const char Escape = 27; // ascii-code

   CvSize FrameSize;
   FrameSize.width = 640;
   FrameSize.height = 480;

   IplImage* ImageOI = cvCreateImage(FrameSize,IPL_DEPTH_32F,3);
   cvZero(ImageOI);

    std::vector<std::string> WindowNames;
    const int NumberOfWindows = 30;
    for (int i=0;i<NumberOfWindows;i++)
    {
        std::stringstream NameTestWindow;
        NameTestWindow << "Test";
        NameTestWindow << "-" << i;
        WindowNames.push_back(NameTestWindow.str());
    }

    while (true)
    {
        for (int i=0;i<NumberOfWindows;i++)
        {
            cvShowImage(WindowNames[i].c_str(),ImageOI);
        }

        char c = cvWaitKey(PlayDelay);
        for (int i=0;i<NumberOfWindows;i++)
        {
            cvDestroyWindow(WindowNames[i].c_str());
        }
        if (c == Escape ) break;
    }

    cvReleaseImage(&ImageOI);
    return 0;

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: unity 7.0.0daily13.06.19~13.04-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Tue Oct 15 11:28:28 2013
InstallationDate: Installed on 2013-06-05 (132 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Andrea Azzarone (azzar1)]

13.04 is no longer supported. Is this still a problem on 12.04/14.04/14.10?

[Bernard Decock (decockbernard)]

Ubuntu 14.04. Problem seems to be solved.