RE: [gtkmm] TreeView Model, SEGV on append

["Ohrnberger, Erik" <erik_ohrnberger dme net>]

Umm.  

Does the void Gtk::ListStore::clear() also invalidate the model assignment?
(as in a previous ListStore::create call?)

It just struck me.

> -----Original Message-----
> From: Ohrnberger, Erik 
> Sent: Wednesday, November 12, 2003 2:33 PM
> To: gtkmm-list gnome org
> Subject: RE: [gtkmm] TreeView Model, SEGV on append
> 
> 
> For those who are interested:
> 
> 	I found out that if I have a second 
> Glib::RefPtr<Gtk::ListStore> in the class, and use it as a 
> backup copy of the model, that it does not go to NULL in 
> methods after the CTOR, when the primary copy does.
> 
> 	Very strange.  I guess this is a workaround for now, 
> though less than satisfying.
> 
> 	Cheers,
> 		Erik.
> 
> > -----Original Message-----
> > From: Murray Cumming Comneon com [mailto:Murray Cumming Comneon com]
> > Sent: Wednesday, November 12, 2003 9:49 AM
> > To: erik_ohrnberger dme net; gtkmm-list gnome org
> > Subject: RE: [gtkmm] TreeView Model, SEGV on append
> > 
> > 
> > If you actually make a small 
> > simple-as-possible-but-compileable example that
> > has this problem then I guess I will take the time to find 
> your error.
> > 
> > Murray Cumming
> > www.murrayc.com
> > murrayc usa net
> > 
> > > -----Original Message-----
> > > From: gtkmm-list-admin gnome org 
> > > [mailto:gtkmm-list-admin gnome org] On Behalf Of Ohrnberger, Erik
> > > Sent: Dienstag, 11. November 2003 20:48
> > > To: gtkmm-list gnome org
> > > Subject: RE: [gtkmm] TreeView Model, SEGV on append
> > > 
> > > 
> > > Murray,
> > > 	Yes, I've done that.  
> > > 
> > > 	A simple little program that uses the class that I've 
> > > been describing in a simple window with a button.  
> > > 
> > > 	When the button is clicked, the signal fires a method 
> > > on the window class that calls the same 'append' method on 
> > > the class as the other application.  Just that in the test 
> > > program it does not crash.  It goes on and merrily adds as 
> > > many lines as you click on the button.
> > > 
> > > 	Here is the backtrace:
> > > 
> > > #0  0x401b0fc5 in Gtk::ListStore::append() () from 
> > > /usr/lib/libgtkmm-2.0.so.1 #1  0xbfffeea0 in ?? () #2  
> > > 0x080d1151 in MoldList::Directory(std::string) 
> > > (this=0x82e9c48, pattern={static npos = 4294967295, 
> > > _M_dataplus = {<allocator<char>> = {<No data fields>}, _M_p = 
> > > 0x82ea90c "Mold.*.obst"}, static _S_empty_rep_storage
> > > =         {0,
> > >         0,
> > >         8,
> > >         0}}) at MoldList.cpp:217
> > > #3  0x080e5ac3 in ToolRoomNotebook (this=0x82e9c0c) at 
> > > ToolRoomNotebook.cpp:145 #4  0x080f91a4 in ToolRoomTab 
> > > (this=0x82e9bd4) at ToolRoomTab.cpp:38 #5  0x080c7b1e in 
> > > MainNotebook (this=0x82e9b8c) at MainNotebook.cpp:41 #6  
> > > 0x080c9dff in MainWindow (this=0x82e9b80) at 
> > > MainWindow.inl.h:34 #7  0x080fe244 in main (argc=1, 
> > > argv=0xbffff4a4) at main.cpp:59 #8  0x4102b977 in 
> > > __libc_start_main () from /lib/libc.so.6
> > > 
> > > > -----Original Message-----
> > > > From: Murray Cumming Comneon com 
> > [mailto:Murray Cumming Comneon com]
> > > > Sent: Tuesday, November 11, 2003 2:31 PM
> > > > To: erik_ohrnberger dme net; Murray Cumming Comneon com; 
> > > > gtkmm-list gnome org
> > > > Subject: RE: [gtkmm] TreeView Model, SEGV on append
> > > > 
> > > > 
> > > > > From: Ohrnberger, Erik [mailto:erik_ohrnberger dme net] 
> > > > > 	Later in the execution, there is a need to add a single
> > > > > additional row to the treeview, however in this method of the 
> > > > > class, I get a SEGV in the call into the model's 
> append method (
> > > > > Glib::RefPtr<Gtk::ListStore>->append() ) and I can't figure 
> > > > out why.
> > > > > 
> > > > > It's basically driving me nutz.  The darn thing should work
> > > > > just as it is, but ain't.
> > > > 
> > > > You are making some very simple error, possibly a typo. As I
> > > > think we've
> > > > said before, if you try to reduce it to a simple compileable 
> > > > test case then
> > > > you will probalby find your error on the way. That's just 
> > > > normal debugging.
> > > > 
> > > > Murray Cumming
> > > > www.murrayc.com
> > > > murrayc usa net
> > > > 
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> > > gtkmm-list gnome org 
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> > > 
> > 
>