Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x2b876913ade0 (LWP 13028)]
ptfree (mem=0x2aaa00000000) at libs/csutil/ptmalloc/ptmalloc3.c:869
869       if (is_mmapped(p)) {                      /* release mmapped memory. */
Current language:  auto; currently c
(gdb) bt
#0  ptfree (mem=0x2aaa00000000) at libs/csutil/ptmalloc/ptmalloc3.c:869
#1  0x00002aaaaad8624d in ~csGLFontCache (this=0x709070) at ./include/cssysdef.h:804
#2  0x00002b8767ccc222 in csGraphics2D::Close (this=0x2b8769167478) at libs/csplugincommon/canvas/graph2d.cpp:306
#3  0x00002aaaaab4c055 in csGraphics2DGLX::Close (this=0x2b8769167478) at plugins/video/canvas/openglx/glx2d.cpp:192
#4  0x00002b8769e64f0d in CS::Plugin::gl3d::csGLGraphics3D::Close (this=0x2b8769198ce0) at plugins/video/render3d/opengl/gl_render3d.cpp:1177
#5  0x00002b8769e6310b in CS::Plugin::gl3d::csGLGraphics3D::HandleEvent (this=0x2aaa00000000, Event=@0x0) at plugins/video/render3d/opengl/gl_render3d.cpp:3550
#6  0x00002b8769e7aded in CS::Plugin::gl3d::csGLGraphics3D::EventHandler::HandleEvent (this=<value optimized out>, ev=@0x0) at plugins/video/render3d/opengl/gl_render3d.h:741
#7  0x00002b8767b62c60 in csEventTree::Dispatch (this=0x6221e0, e=@0x2b87695315f8) at libs/csutil/cssubscription.cpp:576
#8  0x00002b8767b2fa28 in csEventQueue::Dispatch (this=0x2aaabbd450e0, e=@0x2b87695315f8) at libs/csutil/cseventq.cpp:307
#9  0x00002b8767c87496 in csInitializer::CloseApplication (r=<value optimized out>) at libs/cstool/initapp.cpp:475
#10 0x00002b8767c875e0 in csInitializer::DestroyApplication (r=0x2aaa00000000) at libs/cstool/initapp.cpp:481
#11 0x00000000004085a0 in main (argc=3, argv=<value optimized out>) at apps/celstart/celstart.cpp:804
#12 0x00002b87685481ea in __libc_start_main () from /lib/libc.so.6
#13 0x0000000000401fb9 in _start ()
(gdb)