From 880df6024e143de15e86dc216f885e367be05d7a Mon Sep 17 00:00:00 2001
From: Jaron Kent-Dobias <jaron@kent-dobias.com>
Date: Sun, 29 Mar 2020 19:05:19 -0400
Subject: Fixed bug that prematurely marked some bowtie flaps as unbreakable.

---
 lib/src/network.cpp | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/lib/src/network.cpp b/lib/src/network.cpp
index 58dde78..2bbd9b8 100644
--- a/lib/src/network.cpp
+++ b/lib/src/network.cpp
@@ -310,8 +310,6 @@ void network::update_backbone(const std::vector<double>& c, const std::array<dou
         // if any of them spans the torus and therefore can carry current.
         if (std::any_of(all_sigs.begin(), all_sigs.end(), cycle_check_current)) {
           // If none does, we remove it from the backbone!
-          seen_pairs_x[{G.dual_edges[i].v[0], G.dual_edges[i].v[1]}] = true;
-          seen_pairs_y[{G.dual_edges[i].v[0], G.dual_edges[i].v[1]}] = true;
           backbone[i] = true;
 
           // We're not done yet: we've severed the stem but the pop remains! We
@@ -347,7 +345,9 @@ void network::update_backbone(const std::vector<double>& c, const std::array<dou
               }
             }
           }
-        } else if (std::any_of(all_sigs.begin(), all_sigs.end(), cycle_check_wrap_x)) {
+        }
+
+        if (std::any_of(all_sigs.begin(), all_sigs.end(), cycle_check_wrap_x)) {
           // If the bond separates a wrapping path, breaking it would end the
           // fracture and therefore it will never be removed from the backbone
           // in this manner. We can skip it in the future.
@@ -462,10 +462,6 @@ void network::update_backbone(const std::vector<double>& c, const std::array<dou
               }
 
               if (std::any_of(all_sigs.begin(), all_sigs.end(), cycle_check_current)) {
-                // one of our pairs qualifies for trimming!
-                seen_pairs_x[{d1, d2}] = true;
-                seen_pairs_y[{d1, d2}] = true;
-
                 // We separate the flaps of the bowtie (there may be more than
                 // two!) into distinct sets.
                 std::list<std::set<unsigned>> flaps = this->get_tie_flaps(v);
@@ -498,7 +494,9 @@ void network::update_backbone(const std::vector<double>& c, const std::array<dou
                     }
                   }
                 }
-              } else if (std::any_of(all_sigs.begin(), all_sigs.end(), cycle_check_wrap_x)) {
+              }
+
+              if (std::any_of(all_sigs.begin(), all_sigs.end(), cycle_check_wrap_x)) {
                 seen_pairs_x[{d1, d2}] = true;
               } else if (std::any_of(all_sigs.begin(), all_sigs.end(), cycle_check_wrap_y)) {
                 seen_pairs_y[{d1, d2}] = true;
-- 
cgit v1.2.3-70-g09d2