RE: [gtkmm] Segmentation fault in Gtk::TreeView::append_column

[Murray Cumming Comneon com]

Have you ruled out the dynamic_cast<> bug mentioned in the FAQ?

Murray Cumming
murrayc usa net
www.murrayc.com 

> -----Original Message-----
> From: kickvb touva be [mailto:kickvb touva be] 
> Sent: Montag, 23. Juni 2003 18:22
> To: gtkmm-list gnome org
> Subject: [gtkmm] Segmentation fault in Gtk::TreeView::append_column
> 
> 
> Hi!
> 
> We have an embarrassing bug. We don't know if that's our program that 
> corrupts the memory or if it can be a problem with Gtkmm, so 
> we try on this 
> list.
> 
> The bug causes a segfault in an object overriding a 
> Gtk::TreeView always at 
> the first append_column in the constructor (line #18 in the 
> backtrace). It 
> doesn't crash if all the append_column's are commented. It 
> doesn't crash all 
> the time, but appears more or less randomly. The backtrace is 
> always the same.
> 
> Does anyone have an idea of what it could be?
> Thanks a lot for your time.
> 
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 1024 (LWP 9024)]
> 0x40518ca3 in __class_type_info::do_find_public_subobj 
> (this=0x4051e878, 
> boff=-1, subtype= 0x4050de70, objptr=0xd, subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> Current language:  auto; currently c++
> (gdb) bt
> #0  0x40518ca3 in __class_type_info::do_find_public_subobj 
> (this=0x4051e878, 
> boff=-1, subtype= 0x4050de70, objptr=0xd, subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #1  0x40518cc9 in __class_type_info::do_find_public_subobj 
> (this=0x4050de70, 
> boff=-1, subtype= 0x4050de70, objptr=0xd, subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #2  0x40518cc9 in __class_type_info::do_find_public_subobj 
> (this=0x4050de60, 
> boff=-1, subtype= 0x4050de70, objptr=0x887c410, subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #3  0x40518cc9 in __class_type_info::do_find_public_subobj 
> (this=0x401f633c, 
> boff=-1, subtype= 0x4050de70, objptr=0x887c410, subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #4  0x40518cc9 in __class_type_info::do_find_public_subobj 
> (this=0x401f680c, 
> boff=-1, subtype= 0x4050de70, objptr=0x887c410, subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #5  0x40518cc9 in __class_type_info::do_find_public_subobj 
> (this=0x401f6024, 
> boff=-1, subtype= 0x4050de70, objptr=0x887c410, subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #6  0x40518cc9 in __class_type_info::do_find_public_subobj 
> (this=0x86776e8, 
> boff=-1, subtype= 0x4050de70, objptr=0x887c410, subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #7  0x405183e5 in __user_type_info::dyncast (this=0x8677bb4, boff=-1, 
> target= 0x86776e8, objptr=0x887c410, subtype= 0x4050de70, 
> subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #8  0x4051a3ee in __dynamic_cast (from=0x84bd3c0 
> <TransferList type_info 
> function>, to=0x80d492c <Gtk::TreeView type_info function>, 
> require_public=1, 
> address=0x887c410, 
>     sub=0x80d3b7c <Glib::ObjectBase type_info function>, 
> subptr=0x887c4fc) 
> from /usr/lib/libsigc-1.2.so.5
> #9  0x4016ce31 in Gtk::TreeView_Class::columns_changed_callback 
> (self=0x871e808) at treeview.cc:1487
> #10 0x4060a6f6 in g_cclosure_marshal_VOID__VOID (closure=0x88612f8, 
> return_value=0x0, n_param_values=1, param_values=0xbfffe4c8, 
> invocation_hint=0xbfffe3b4, 
>     marshal_data=0x4016cde0) at gmarshal.c:77
> #11 0x405f636f in g_type_class_meta_marshal (closure=0x88612f8, 
> return_value=0x0, n_param_values=1, param_values=0xbfffe4c8, 
> invocation_hint=0xbfffe3b4, marshal_data=0x1b8)
>     at gclosure.c:514
> #12 0x405f5f7e in g_closure_invoke (closure=0x88612f8, 
> return_value=0x0, 
> n_param_values=1, param_values=0xbfffe4c8, 
> invocation_hint=0xbfffe3b4) at 
> gclosure.c:437
> #13 0x40609cba in signal_emit_unlocked_R (node=0x8861328, detail=0, 
> instance=0x871e808, emission_return=0x0, 
> instance_and_params=0xbfffe4c8) at 
> gsignal.c:2860
> #14 0x406080b2 in g_signal_emit_valist (instance=0x871e808, 
> signal_id=182, 
> detail=0, var_args=0xbfffe64c) at gsignal.c:2554
> #15 0x40608370 in g_signal_emit (instance=0x871e808, 
> signal_id=182, detail=0) 
> at gsignal.c:2612
> #16 0x403dfea9 in gtk_tree_view_insert_column (tree_view=0x871e808, 
> column=0x888d8b8, position=-1) at gtktreeview.c:8441
> #17 0x403dfa92 in gtk_tree_view_append_column (tree_view=0x871e808, 
> column=0x888d8b8) at gtktreeview.c:8326
> #18 0x4016e754 in Gtk::TreeView::append_column (this=0x887c380, 
> column= 0x888d760) at treeview.cc:1982
> #19 0x0818337f in TransferList::TransferList () at eval.c:41
> #20 0x08189ae7 in UploadList::UploadList () at eval.c:41
> #21 0x0816ec86 in TransferFrame::TransferFrame () at eval.c:41
> #22 0x08123cab in MainWindow::update_init () at eval.c:41
> #23 0x084b9532 in SigC::ObjectSlot0_<bool, MainWindow>::proxy () at 
> streambuf.cc:351
> #24 0x404e7a0c in {anonymous}::glibmm_source_callback 
> (data=0x8855878) 
> at /usr/include/sigc++-1.2/sigc++/slot.h:196
> #25 0x4065031b in g_timeout_dispatch (source=0x885ec30, 
> callback=0x404e797c <
> {anonymous}::glibmm_source_callback(void *)>, user_data=0x8855878) at 
> gmain.c:3016
> #26 0x4064dcfb in g_main_dispatch (context=0x868abe0) at gmain.c:1653
> #27 0x4064eb4a in g_main_context_dispatch (context=0x868abe0) 
> at gmain.c:2197
> #28 0x4064ef27 in g_main_context_iterate (context=0x868abe0, block=1, 
> dispatch=1, self=0x8725b50) at gmain.c:2278
> #29 0x4064f640 in g_main_loop_run (loop=0x87ebb28) at gmain.c:2498
> #30 0x40330931 in gtk_main () at gtkmain.c:1092
> #31 0x40125a0f in Gtk::Main::run_impl (this=0xbffff680) at main.cc:470
> #32 0x40125746 in Gtk::Main::run () at main.cc:417
> #33 0x080db39a in main () at eval.c:41
> #34 0x406ea177 in __libc_start_main (main=0x80d9390 <main>, argc=1, 
> ubp_av=0xbffff80c, init=0x80d3464 <_init>, fini=0x854cc24 <_fini>, 
> rtld_fini=0x4000e184 <_dl_fini>, 
>     stack_end=0xbffff7fc) at ../sysdeps/generic/libc-start.c:129
> (gdb) 
> 
> 
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