Commit: 77c3ecf88c3109e5a6b14f6e064fe1a88644bab6
Author: Campbell Barton
Date:   Sat Dec 26 14:26:30 2015 +1100
Branches: master
https://developer.blender.org/rB77c3ecf88c3109e5a6b14f6e064fe1a88644bab6

BMesh: check at least 2 edges in each loops vert

Also no need to check twice

===================================================================

M       source/blender/bmesh/intern/bmesh_core.c

===================================================================

diff --git a/source/blender/bmesh/intern/bmesh_core.c 
b/source/blender/bmesh/intern/bmesh_core.c
index 29178c2..b166d60 100644
--- a/source/blender/bmesh/intern/bmesh_core.c
+++ b/source/blender/bmesh/intern/bmesh_core.c
@@ -683,7 +683,7 @@ int bmesh_elem_check(void *element, const char htype)
                                                err |= 
IS_FACE_LOOP_WRONG_RADIAL_LENGTH;
                                        }
 
-                                       if (!bmesh_disk_count(l_iter->v) || 
!bmesh_disk_count(l_iter->next->v)) {
+                                       if (bmesh_disk_count_ex(l_iter->v, 2) < 
2) {
                                                err |= 
IS_FACE_LOOP_WRONG_DISK_LENGTH;
                                        }
                                }
@@ -937,9 +937,6 @@ void BM_face_kill_loose(BMesh *bm, BMFace *f)
 void BM_edge_kill(BMesh *bm, BMEdge *e)
 {
 
-       bmesh_disk_edge_remove(e, e->v1);
-       bmesh_disk_edge_remove(e, e->v2);
-
        if (e->l) {
                BMLoop *l = e->l, *lnext, *startl = e->l;
 
@@ -957,6 +954,9 @@ void BM_edge_kill(BMesh *bm, BMEdge *e)
                        l = lnext;
                } while (l != startl);
        }
+
+       bmesh_disk_edge_remove(e, e->v1);
+       bmesh_disk_edge_remove(e, e->v2);
        
        bm_kill_only_edge(bm, e);
 }

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