g_list behavior: what am I doing wrong?

[Allin Cottrell <cottrell wfu edu>]

This must be something simple, but what am I doing wrong with 
g_list_prepend() below?  It seems to have the effect of erasing the 
original list and replacing it with a singleton element.

#include <glib.h>

int main (void)
{
    GList *list = NULL;

    list = g_list_append(list, "foo");
    list = g_list_append(list, "bar");
    list = g_list_append(list, "baz");

    puts("\nBefore prepending:");

    while (list) {
        printf("list data = '%s'\n", (char *) list->data);
        list = g_list_next(list);
    }

    list = g_list_first(list);
    list = g_list_prepend(list, "quux");

    puts("\nAfter prepending:");

    while (list) {
        printf("list data = '%s'\n", (char *) list->data);
        list = g_list_next(list);
    }

    return 0;
}

On my system, the first print performs as expected:

Before prepending:
list data = 'foo'
list data = 'bar'
list data = 'baz'

But the second says:

After prepending:
list data = 'quux'

???

--
Allin Cottrell
Department of Economics
Wake Forest University, NC