From 8f4cd4793a010d3c692243216e12128a422053fe Mon Sep 17 00:00:00 2001
From: dpasukhi <dpasukhi@opencascade.com>
Date: Wed, 11 Jan 2023 11:29:08 +0000
Subject: [PATCH] TL: OCC preprocessing fail (#354)

Fixed problem with empty edge list in the edge loop.
---
 src/RWStepShape/RWStepShape_RWEdgeLoop.cxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/RWStepShape/RWStepShape_RWEdgeLoop.cxx b/src/RWStepShape/RWStepShape_RWEdgeLoop.cxx
index dd0097813b..f6cc79a34f 100644
--- a/src/RWStepShape/RWStepShape_RWEdgeLoop.cxx
+++ b/src/RWStepShape/RWStepShape_RWEdgeLoop.cxx
@@ -106,6 +106,11 @@ void RWStepShape_RWEdgeLoop::Check
   Standard_Boolean headToTail = Standard_True;
   //Standard_Boolean noIdentVtx = Standard_True; //szv#4:S4163:12Mar99 unused
   Standard_Integer nbEdg = ent->NbEdgeList();
+  if (nbEdg == 0)
+  {
+    ach->AddFail("Edge loop contains empty edge list");
+    return;
+  }
   Handle(StepShape_OrientedEdge) theOE = ent->EdgeListValue(1);
   Handle(StepShape_Vertex) theVxFrst = theOE->EdgeStart();
   Handle(StepShape_Vertex) theVxLst  = theOE->EdgeEnd();
-- 
2.39.5