[PlayerStage-Gazebo] Factory delete model segfaults

[jungle <ag...@co...>]

It's a pretty straight-forward problem.

I'm using a slightly modified version of the example libgazebo factory.cc
The following is the relevant part. 

stream << "<model:physical name='box1_model_" << i << "'>";
      stream << "  <xyz>" << i << " " << i << " " << 0.5 << " </xyz>";
      stream << "  <body:box name='box1_body'>";
      stream << "   <geom:box name='box1_geom'>";
      stream << "     <size>1 1 1</size>";
      stream << "     <mass>0.1</mass>";
      stream << "     <visual>";
      stream << "       <size>1 1 1</size>";
      stream << "       <mesh>unit_box</mesh>";
      stream << "        <material>Gazebo/Rocky</material>";
      stream << "      </visual>";
      stream << "    </geom:box>";
      stream << "  </body:box>";
      stream << "</model:physical>";


      printf("Creating[%d]\n",i);
      strcpy((char*)factoryIface->data->newModel, stream.str().c_str());

... and later

      stream << "box1_model_" << i;

      printf("Deleting[%d]\n",i);
      strcpy((char*)factoryIface->data->deleteModel, stream.str().c_str());


These are the only changes to the original code.  The problem is the
following.
The program factory executes and exits without a problem.  The blocks show
up in the simulation as they are created.  However, they do not disappear
when they are deleted.  When I click on a block that should have been
deleted, gazebo segfaults (understandably) with no error messages. 
Backtrace follows:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1210378512 (LWP 16610)]
0x48889c0d in __dynamic_cast () from /usr/lib/libstdc++.so.6
(gdb) bt
#0  0x48889c0d in __dynamic_cast () from /usr/lib/libstdc++.so.6
#1  0x080ea07e in gazebo::OgreAdaptor::GetEntityAt (this=0x821e3c8, 
    camera=0x8ce2c20, mousePos=@0xbfa8c394)
    at server/rendering/OgreAdaptor.cc:487
#2  0x0812b144 in gazebo::GLWindow::HandleMouseRelease (this=0x82d3190)
    at server/gui/GLWindow.cc:204
#3  0x0812b25e in gazebo::GLWindow::handle (this=0x82d3190, event=2)
    at server/gui/GLWindow.cc:407
#4  0xb7ddff4a in Fl::pushed () from /usr/lib/libfltk.so.1.1
#5  0xb7de1a03 in Fl::handle () from /usr/lib/libfltk.so.1.1
#6  0xb7e30b10 in fl_handle () from /usr/lib/libfltk.so.1.1
#7  0xb7e31b47 in fl_handle () from /usr/lib/libfltk.so.1.1
#8  0xb7e31d9b in fl_wait () from /usr/lib/libfltk.so.1.1
#9  0xb7de0827 in Fl::wait () from /usr/lib/libfltk.so.1.1
#10 0xb7de0866 in Fl::check () from /usr/lib/libfltk.so.1.1
#11 0x08128a62 in gazebo::Gui::Update (this=0x8238580) at
server/gui/Gui.cc:146
#12 0x08150a21 in gazebo::Simulator::MainLoop (this=0x82111e0)
    at server/Simulator.cc:329
#13 0x08134eb8 in main (argc=1221596980, argv=0xb7f23558) at
server/main.cc:293


Is this a bug, or am I doing something wrong?  

Thanks,
Bill


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