title: what reason can cause g_hash_table_steal to return false?
body: <p>My program uses <code>g_hash_table_steal</code> to remove a key and its associated value from a GHashTable (libglib-2.0.so.0  RedHat 7.4). But it returns false. What reason can cause <code>g_hash_table_steal</code> to return false? </p>