ok, here we go: I recompiled the snapshot with G_DEBUG=fatal-criticals....but 
still the symbols are missing somehow.

Core was generated by `gwyddion'.
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
#0  0x00007f249d48ad00 in g_logv () from /usr/lib/libglib-2.0.so.0
(gdb) bt
#0  0x00007f249d48ad00 in g_logv () from /usr/lib/libglib-2.0.so.0
#1  0x00007f249d48af1f in g_log () from /usr/lib/libglib-2.0.so.0
#2  0x00007f247e22e186 in test_plugin (current_data=0x0, run=GWY_RUN_NONE) at 
fft_plugin.c:222
#3  0x00007f249f4fce63 in gwy_process_func_run () from 
/usr/lib/libgwymodule2.so.0
#4  0x00007f249f73e4d0 in gwy_app_run_process_func_in_mode () from 
/usr/lib/libgwyapp2.so.0
#5  0x00007f249f73e7af in gwy_app_run_process_func () from 
/usr/lib/libgwyapp2.so.0
#6  0x00007f249d754435 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#7  0x00007f249d7669fc in ?? () from /usr/lib/libgobject-2.0.so.0
#8  0x00007f249d76f228 in g_signal_emit_valist () from 
/usr/lib/libgobject-2.0.so.0
#9  0x00007f249d76f48f in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#10 0x00007f249e86c836 in gtk_widget_activate () from 
/usr/lib/libgtk-x11-2.0.so.0
#11 0x00007f249e7687bd in gtk_menu_shell_activate_item () from 
/usr/lib/libgtk-x11-2.0.so.0
#12 0x00007f249e768b5b in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#13 0x00007f249e7568bf in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#14 0x00007f249d754435 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#15 0x00007f249d7668f2 in ?? () from /usr/lib/libgobject-2.0.so.0
#16 0x00007f249d76ed36 in g_signal_emit_valist () from 
/usr/lib/libgobject-2.0.so.0
#17 0x00007f249d76f48f in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#18 0x00007f249e86daac in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#19 0x00007f249e755004 in gtk_propagate_event () from 
/usr/lib/libgtk-x11-2.0.so.0
#20 0x00007f249e75549b in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#21 0x00007f249e3cae4c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#22 0x00007f249d483c7d in g_main_context_dispatch () from 
/usr/lib/libglib-2.0.so.0
#23 0x00007f249d483f68 in ?? () from /usr/lib/libglib-2.0.so.0
#24 0x00007f249d484292 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#25 0x00007f249e754417 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#26 0x0000000000408a8c in main ()

Do I need to recompile gwyddion width -g to get more reasonable information?

On  0, "David Nečas (Yeti)" <[email protected]> wrote:
> On Mon, Sep 15, 2014 at 10:23:19AM +0200, Mathias Müller wrote:
> > I implemented the postprocess function to my plugin code. It compiles 
> > without errors.
> > However, when loading my plugin gwyddion crashes. 
> > 
> > (gwyddion:20392): GLib-GObject-CRITICAL **: g_object_set_data: assertion 
> > 'G_IS_OBJECT (object)' failed
> > zsh: trace trap (core dumped)  gwyddion
> > 
> > But this doesn't relate to this very new function. When commenting the 
> > postprocess() it still crashes.
> > Returning to the stable version (cleaning the 
> > system,recompiling,installing,etc...and the code without postprocess) 
> > the plugin works pretty well - again. The same code recompiled with the 
> > nightly snapshot...nope.
> > 
> > Further, I cannot use the ctrl+{1,2,3..} to open recently opened data. 
> > Gwyddion crashes already when pressing <ctrl>
> > 
> > (gwyddion:19037): Gtk-CRITICAL **: IA__gtk_widget_event: assertion 
> > 'WIDGET_REALIZED_FOR_EVENT (widget, event)' failed
> 
> Please get backtraces from the coredumps.  These are generic errors
> that can appear practically anywhere if a bad pointer is passed to some
> function.  If it does not dump core
> a) set ulimit -c unlimited
> b) run gwyddion with G_DEBUG=fatal-criticals
> 
> Regards,
> 
> Yeti

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