Program received signal SIGSEGV, Segmentation fault.
0x004014ff in gtk_tree_store_reorder (tree_store=0xad7000, parent=0x0,
    new_order=0x22ff4c) at gtktreestore.c:2317
2317  sort_array[length-1].node->next = NULL;
(gdb) bt
#0  0x004014ff in gtk_tree_store_reorder (tree_store=0xad7000, parent=0x0,
    new_order=0x22ff4c) at gtktreestore.c:2317
#1  0x00401e97 in main () at test1.c:129
