The following causes a seg fault because it attempts to reference a CTree
node which does not exist:
>>> import gtk
>>> tree = gtk.GtkCTree()
>>> n = tree.node_nth(10)
>>> print n.parent
Looking at the source, it appears that the C api function returns NULL in
this case, but this pointer is passed to PyGtkCTreeNode_New. The pointer
is then stored and dereferenced in the get attr function, causing the seg
fault. There are a couple ways to fix this that are relatively easy to
implement:
* Return None if the pointer is NULL.
* Throw an exception if NULL is returned.
My question is which is the preferred method in this case and whether all
the cases where a node is returned should be handled the same way -- are
there cases where NULL would be an acceptable value rather than a result
of passing incorrect values to function. Also, should other boxed types
act the same way.
Thanks,
John
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