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  1. GMAT
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Segmentation Fault when closing with open OrbitView on Linux



      Running on Linux, GMAT consistently crashes with a segmentation fault on exit if the user leaves an OrbitView window open. To see this, run GMAT on Linux from a terminal window. Run the Hohmann transfer sample script. Close GMAT using the close button on the window frame. GMAT will close, but in the close process, it looks like it is trying to delete an already deleted handle. Here is the backtrace:

      Program received signal SIGSEGV, Segmentation fault.
      0x00007ffff2570f18 in main_arena () from /lib/x86_64-linux-gnu/libc.so.6
      (gdb) bt
      #0  0x00007ffff2570f18 in main_arena () from /lib/x86_64-linux-gnu/libc.so.6
      #1  0x000000000061da49 in GmatMdiChildFrame::UpdateGuiItem (this=0x1926800, updateEdit=0, updateAnimation=0)
          at foundation/GmatMdiChildFrame.cpp:780
      #2  0x000000000061be7f in GmatMdiChildFrame::~GmatMdiChildFrame (this=0x1926800, __in_chrg=<optimized out>)
          at foundation/GmatMdiChildFrame.cpp:179
      #3  0x000000000089e404 in MdiChildViewFrame::~MdiChildViewFrame (this=0x1926800, __in_chrg=<optimized out>)
          at subscriber/MdiChildViewFrame.cpp:78
      #4  0x00000000008a5588 in MdiChild3DViewFrame::~MdiChild3DViewFrame (this=0x1926800, __in_chrg=<optimized out>)
          at subscriber/MdiChild3DViewFrame.cpp:60
      #5  0x00000000008a55b8 in MdiChild3DViewFrame::~MdiChild3DViewFrame (this=0x1926800, __in_chrg=<optimized out>)
          at subscriber/MdiChild3DViewFrame.cpp:62
      #6  0x00007ffff3741f36 in wxWindowBase::DestroyChildren() () from ./lib/libwx_gtk2_core-2.8.so.0
      #7  0x00007ffff367e7a2 in wxWindow::~wxWindow() () from ./lib/libwx_gtk2_core-2.8.so.0
      #8  0x00007ffff36bd0d9 in wxMDIClientWindow::~wxMDIClientWindow() () from ./lib/libwx_gtk2_core-2.8.so.0
      #9  0x00007ffff3741f36 in wxWindowBase::DestroyChildren() () from ./lib/libwx_gtk2_core-2.8.so.0
      #10 0x00007ffff367e7a2 in wxWindow::~wxWindow() () from ./lib/libwx_gtk2_core-2.8.so.0
      #11 0x000000000047fc88 in GmatMainFrame::~GmatMainFrame (this=0x1779050, __in_chrg=<optimized out>) at app/GmatMainFrame.cpp:561
      #12 0x000000000047fd18 in GmatMainFrame::~GmatMainFrame (this=0x1779050, __in_chrg=<optimized out>) at app/GmatMainFrame.cpp:623
      #13 0x00007ffff36d8a82 in wxAppBase::DeletePendingObjects() () from ./lib/libwx_gtk2_core-2.8.so.0
      #14 0x00007ffff36d8c2b in wxAppBase::ProcessIdle() () from ./lib/libwx_gtk2_core-2.8.so.0
      #15 0x00007ffff36568ee in wxapp_idle_callback () from ./lib/libwx_gtk2_core-2.8.so.0
      #16 0x00007ffff11973b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
      #17 0x00007ffff1197708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
      #18 0x00007ffff1197b0a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
      #19 0x00007ffff1c9e277 in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
      #20 0x00007ffff366a818 in wxEventLoop::Run() () from ./lib/libwx_gtk2_core-2.8.so.0
      #21 0x00007ffff36d899c in wxAppBase::MainLoop() () from ./lib/libwx_gtk2_core-2.8.so.0
      #22 0x00007ffff33db5d5 in wxEntry(int&, char**) () from ./lib/libwx_base-2.8.so.0
      #23 0x0000000000455944 in main (argc=1, argv=0x7fffffffdf58) at app/GmatApp.cpp:59

      The crash is seen on Linux. It might have implications for other platforms, or it could be a "feature" of wxGTK.

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