Re: Callback inheritance problem with Gtk.TextBuffer and llvm-gcc > 4.2

[Johan Dahlin <johan gnome org>]

If you run your program under valgrind, will it report any relevant errors?

Remember to use the python supressions file, or you'll get a lot of
false positives.


On Sat, Jun 8, 2013 at 1:17 PM, John Ralls <jralls ceridwen us> wrote:
> In Gramps we have a class derived from GtkTextBuffer which crashes during init because the default callback 
> for
> mark-set signal doesn't exist. We don't reset the handler, and the crash occurs before the only instance of 
> connecting
> to the signal. It crashes only when compiled with llvm-gcc-4.2 provided in Xcode 4.4 or later; when 
> compiled with gcc-4.2  from Xcode 3 or with llvm-gcc-4.2 from Xcode 4.2, it works fine. Disabling 
> optimization doesn't make a difference.
>
> The top of the stack trace follows on the off chance it might be useful.
>
> Anyone have any ideas for further investigation or for a workaround?
>
> Regards,
> John Ralls
>
> #0  0x02bb9fe9 in g_type_class_meta_marshal (closure=0x76745b0, return_value=0x0, n_param_values=3, 
> param_values=0xbfff86e0, invocation_hint=0xbfff8660, marshal_data=0x7677570) at gclosure.c:968
> #1  0x02bba02e in g_type_class_meta_marshal (closure=0x76745b0, return_value=0x0, n_param_values=3, 
> param_values=0xbfff86e0, invocation_hint=0xbfff8660, marshal_data=0x7677570) at gclosure.c:970
> #2  0x02bba02e in g_type_class_meta_marshal (closure=0x76745b0, return_value=0x0, n_param_values=3, 
> param_values=0xbfff86e0, invocation_hint=0xbfff8660, marshal_data=0x5c) at gclosure.c:970
> #3  0x02bb981d in g_closure_invoke (closure=0x76745b0, return_value=0x0, n_param_values=3, 
> param_values=0xbfff86e0, invocation_hint=0xbfff8660) at gclosure.c:777
> #4  0x02bda698 in signal_emit_unlocked_R (node=0x76746b0, detail=0, instance=0xf2d350, emission_return=0x0, 
> instance_and_params=0xbfff86e0) at gsignal.c:3589
> #5  0x02bd96bf in g_signal_emit_valist (instance=0xf2d350, signal_id=185, detail=0, var_args=0xbfff8a04 
> "­Eg\apñÙ") at gsignal.c:3300
> #6  0x02bd9d71 in g_signal_emit (instance=0xf2d350, signal_id=185, detail=0) at gsignal.c:3356
> #7  0x03e1d3e9 in gtk_text_buffer_mark_set (buffer=0xf2d350, location=0xbfff8a60, mark=0xeba470) at 
> gtktextbuffer.c:2043
> #8  0x03e1d4ef in gtk_text_buffer_set_mark (buffer=0xf2d350, existing_mark=0x0, mark_name=0x826fd90 
> "insert-start", iter=0x8270920, left_gravity=1, should_exist=0) at gtktextbuffer.c:2091
> #9  0x03e1d5fa in gtk_text_buffer_create_mark (buffer=0xf2d350, mark_name=0x826fd90 "insert-start", 
> where=0x8270920, left_gravity=1) at gtktextbuffer.c:2131
> #10 0x028f69dd in .LCFI1 () at darwin.S:64
> #11 0x028f6999 in ffi_call (cif=0xbfff8c20, fn=0x3e1d510 <gtk_text_buffer_create_mark>, rvalue=0xbfff8c10, 
> avalue=0xbfff8bb0) at ffi.c:413
> #12 0x02b814a5 in g_callable_info_invoke ()
> #13 0x02b82843 in g_function_info_invoke ()
> #14 0x02b554e6 in _invoke_callable (state=0xbfff8d40, cache=0xf36c00, callable_info=0x3429a30, 
> function_ptr=0) at pygi-invoke.c:64
> #15 0x02b54b58 in pygi_callable_info_invoke (info=0x3429a30, py_args=0x9a080f0, kwargs=0x99ff270, 
> cache=0xf36c00, function_ptr=0, user_data=0x0) at pygi-invoke.c:656
> #16 0x02b55aca in _wrap_g_callable_info_invoke (self=0x46c5cb0, py_args=0x9a080f0, kwargs=0x99ff270) at 
> pygi-invoke.c:679
> #17 0x0004d52c in PyCFunction_Call (func=0x9931350, arg=0xbfff8e18, kw=0x99ff270) at methodobject.c:81
> #18 0x000a62ce in ext_do_call [inlined] () at 
> /Users/john/Development/gtk-sources/Python-2.7.3/Python/ceval.c:4331
> #19 0x000a62ce in PyEval_EvalFrameEx (f=0x82576b0, throwflag=0) at ceval.c:2705
> #20 0x000a871d in PyEval_EvalCodeEx (co=0x3960608, globals=0x2b38270, locals=0x0, args=0x99268dc, 
> argcount=4, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x46c4eb0) at ceval.c:3253
> #21 0x0003835b in function_call (func=0x46c93b0, arg=0x99268d0, kw=0x0) at funcobject.c:526
> #22 0x0000f0b1 in PyObject_Call (func=0x46c93b0, arg=0x99268d0, kw=0x0) at abstract.c:2529
> #23 0x00020e4e in instancemethod_call (func=0xbfff9368, arg=0x99268d0, kw=0x0) at classobject.c:2578
> (More stack frames follow...)
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-- 
Johan Dahlin