Re: how have I managed to break gtk_button_new_with_lable?!

[Havoc Pennington <hp redhat com>]

rob <mailingLists pangolin org uk> writes:
> Here's my bit of code
>
> static void
> AttrEditingFrame_init (AttrEditingFrame *self)
> {
>       GtkWidget *vbox;
>       GtkWidget *newAttrButton;
>        
>       self->attrEntries = g_ptr_array_new();
>       
>       vbox = gtk_vbox_new(FALSE, 5);
>       
>       newAttrButton = gtk_button_new_with_label ("New Attribute");
>       gtk_signal_connect (GTK_OBJECT (newAttrButton),
>                                       "clicked",
>                                       create_attr_cb,
>                                       self);
>       gtk_box_pack_start (GTK_BOX (vbox),
>                           newAttrButton, 
>                           TRUE, TRUE, 5);
>
>       gtk_container_add (GTK_CONTAINER (self), vbox);
> }
>
> It segfaults every time when it gets to gtk_button_new_with_label
>
> Under the terminal it says:
> Gtk-CRITICAL **: file gtkstyle.c: line 611 (gtk_style_ref): assertion
> `style->ref_count > 0' failed.
>
> Under gdb it says:
> Program received signal SIGSEGV, Segmentation fault.
> 0x4059934d in free () from /lib/libc.so.6
>
> any one have any idea I'm completly stumped 

Probably the style is getting munged earlier in your program, and the
gtk_button_new_with_label() is the first time you try to use it
post-munge. Styles for widgets are recycled.

Maybe you have one too many gtk_style_unref() someplace, or something
along those lines.

MALLOC_CHECK_=2 can be a useful tool on Linux, see malloc() man page.

Havoc