Re: [Foxgui-users] Segfault on FXApp delete

[JVZ <je...@fo...>]

On Sat, 7 Jan 2017 20:11:33 +0100
Roland Plüss <ro...@rp...> wrote:

>This is along problem I skimmed around by now deleting the FXApp. I
>would like to clean up things to get it working properly but it just
>ain't working. The following situation:
>
>int main( int argc, char **argv ){
>   FXApp *app = NULL;
>   app = new FXApp( "Drag[en]gine Integrated Game Development
>Environment", "Drag[en]gine" );
>   app->init( argc, argv );
>   FXToolTip *tooltip = new FXToolTip( app );
>   app->create();
>   igdeWindowMain *windowMain = new igdeWindowMain( app, &cmdArgs );
>   windowMain->create();
>   // main loop... once finished
>   delete app;
>   return 0;
>}
>
>Doing this I always get a segfault.
>
>Program received signal SIGSEGV, Segmentation fault.
>0x00007ffff7757c9b in FX::FXComposite::~FXComposite() () from
>/usr/lib64/libFOX-1.7.so.0
>(gdb) bt
>#0  0x00007ffff7757c9b in FX::FXComposite::~FXComposite() () from
>/usr/lib64/libFOX-1.7.so.0
>#1  0x00007ffff782ea09 in FX::FXRootWindow::~FXRootWindow() () from
>/usr/lib64/libFOX-1.7.so.0
>#2  0x00007ffff773a94e in FX::FXApp::~FXApp() () from
>/usr/lib64/libFOX-1.7.so.0
>#3  0x00007ffff773aee9 in FX::FXApp::~FXApp() () from
>/usr/lib64/libFOX-1.7.so.0
>#4  0x000000000040c452 in main (argc=1, argv=<optimized out>) at
>src/tools/linux/deigde/src/deigde.cpp:117
>
>Any ideas why FXApp fails like this? Did I not understand something on
>FXApp inner workings?

This ought to work, under normal circumstances; it is the same sequence
as most of my own apps.

I would try run a memory checker like valgrind and see if there is potentially
some heap-corruption going on elsewhere in the code; this could happen, and
(depending on what it touches), manifest itself at a much later time.



		-- JVZ



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