From b15cf81217be3d6ca203a6bca9df41fc94914d32 Mon Sep 17 00:00:00 2001
From: mattijs <mattijs>
Date: Tue, 9 Apr 2013 12:09:55 +0100
Subject: [PATCH] ENH: autoSnapDriverFeature: protect for zero sized faces

---
 .../autoHexMesh/autoHexMeshDriver/autoSnapDriverFeature.C       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesh/autoMesh/autoHexMesh/autoHexMeshDriver/autoSnapDriverFeature.C b/src/mesh/autoMesh/autoHexMesh/autoHexMeshDriver/autoSnapDriverFeature.C
index cecee33cef..37e61cbbb7 100644
--- a/src/mesh/autoMesh/autoHexMesh/autoHexMeshDriver/autoSnapDriverFeature.C
+++ b/src/mesh/autoMesh/autoHexMesh/autoHexMeshDriver/autoSnapDriverFeature.C
@@ -767,7 +767,7 @@ void Foam::autoSnapDriver::binFeatureFace
 ) const
 {
     // What to do with very far attraction? For now just ignore the face
-    if (magSqr(faceDisp) < sqr(snapDist))
+    if (magSqr(faceDisp) < sqr(snapDist) && mag(faceSurfaceNormal) > VSMALL)
     {
         const point pt = fc + faceDisp;