From 2c0a98671613a50677bd3f1991dfbd38888f5313 Mon Sep 17 00:00:00 2001
From: Daniel Doerr <daniel.doerr@hhu.de>
Date: Tue, 17 Oct 2023 16:58:13 +0200
Subject: [PATCH] fixing bug described in Issue #11, a second time!

---
 src/main.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index c26f54e..dab60a1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -316,7 +316,12 @@ fn collapse(
                         .neighbors(*v, Direction::Right)
                         .filter(|u| !del_subg.edge_deleted(v, u))
                         .collect();
-                    for x in outgoing_edges {
+                    for mut x in outgoing_edges {
+                        if &x == v {
+                            x = w;
+                        } else if x == v.flip() {
+                            x = w.flip()
+                        } 
                         if !graph.has_edge(w, x) {
                             graph.create_edge(Edge::edge_handle(w, x));
                             log::debug!("create edge {}{}", v2str(&w), v2str(&x));