[Bf-blender-cvs] [3cf39fc] master: Fix T39740: New Autosmooth instant crash entering Edit Mode

[Bastien Montagne]

Commit: 3cf39fc72a36bab1c5b82ae96cffe7dd01ce7260
Author: Bastien Montagne
Date:   Mon Apr 14 23:42:38 2014 +0200
https://developer.blender.org/rB3cf39fc72a36bab1c5b82ae96cffe7dd01ce7260

Fix T39740: New Autosmooth instant crash entering Edit Mode

One should always be wary of last minute changes, especially in comples code area... :/

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

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

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

diff --git a/source/blender/bmesh/intern/bmesh_mesh.c b/source/blender/bmesh/intern/bmesh_mesh.c
index bad365a..ee7dc81 100644
--- a/source/blender/bmesh/intern/bmesh_mesh.c
+++ b/source/blender/bmesh/intern/bmesh_mesh.c
@@ -570,7 +570,13 @@ static void bm_mesh_loops_calc_normals(BMesh *bm, const float (*vcos)[3], const
 				while (true) {
 					/* Much simpler than in sibling code with basic Mesh data! */
 					lfan_pivot_next = BM_vert_step_fan_loop(lfan_pivot, &e_next);
-					BLI_assert(lfan_pivot_next->v == v_pivot);
+					if (lfan_pivot_next) {
+						BLI_assert(lfan_pivot_next->v == v_pivot);
+					}
+					else {
+						/* next edge is non-manifold, we have to find it ourselves! */
+						e_next = (lfan_pivot->e == e_next) ? lfan_pivot->prev->e : lfan_pivot->e;
+					}
 
 					/* Compute edge vector.
 					 * NOTE: We could pre-compute those into an array, in the first iteration, instead of computing them