Possible bug in guile-gtk-tree-model implementation

[Stanislas Pinte]

Hello,

I think that there is a bug in the guile-gtk-tree-model implementation,
in the guile_gtk_generic_tree_model_get_iter function (see code below)

I implemented a custom model in guile, with filtering capabilities. When
I update my filter, and when the row count falls down to 0 (I.e. my
filter filters out all elements), I get this error:

test-filtered-model.scm:109:5: (application):
guile_gtk_generic_tree_model_get_value: assertion `iter->user_data !=
NULL' failed

However, I have the impression my model is doing what it should:

If I have 3 elements, upon updating my filter, my model calls

    (row-deleted model (list source-index))

three times.

After that, the GtkTreeView tries to retrieve the first iter:

    on-get-iter path: (0)
    get-iter-at-index index 0

My custom model returns #f, because the path (0) is not visible anymore.
It may be a problem with the following lines in
guile_gtk_generic_tree_model_get_iter implementation:

if (SCM_NFALSEP (scm_ret)) {
        SET_ITER_VAL (iter, scm_ret);
        return TRUE;
    } else {
        SET_ITER_NULL (iter);
        return FALSE;
    }

--> if scm_ret is #f, can I be sure that SCM_NFALSEP will return false?

I wonder anyway why would the GtkTreeView try to retrieve the path (0)
if it has seen 3 row-deleted events...

Thanks in advance for your help ,

Stan.