0024949: Segmentation Violation during pipe creation

Test cases for issue 0024949

Correction of test case for issue CR24949

src/BRepFill/BRepFill_Pipe.cdl

@@ -72,6 +72,9 @@ is
 	---C++ : return const &
     is static;
 
+    ErrorOnSurface (me)
+    returns Real from Standard;
+    
     FirstShape(me) returns Shape from TopoDS
 	---C++ : return const &
     is static;
@@ -185,4 +188,6 @@ fields
     myMode    : Trihedron from GeomFill;
     myForceApproxC1 : Boolean from Standard;
     
+    myErrorOnSurf : Real from Standard;
+    
 end Pipe;

src/BRepFill/BRepFill_Pipe.cxx

@@ -363,6 +363,16 @@ const TopoDS_Shape& BRepFill_Pipe::Shape() const
   return myShape;
 }
 
+//=======================================================================
+//function : ErrorOnSurface
+//purpose  : 
+//=======================================================================
+
+Standard_Real BRepFill_Pipe::ErrorOnSurface() const 
+{
+  return myErrorOnSurf;
+}
+
 
 //=======================================================================
 //function : FirstShape
@@ -521,6 +531,7 @@ TopoDS_Wire BRepFill_Pipe::PipeLine(const gp_Pnt& Point)
  MkSw.Build( myReversedEdges, myTapes, myRails,
              BRepFill_Modified, myContinuity, GeomFill_Location, myDegmax, mySegmax );
  TopoDS_Shape aLocalShape = MkSw.Shape();
+ myErrorOnSurf = MkSw.ErrorOnSurface();
  return TopoDS::Wire(aLocalShape);
 // return TopoDS::Wire(MkSw.Shape());
 }
@@ -648,6 +659,7 @@ TopoDS_Shape BRepFill_Pipe::MakeShape(const TopoDS_Shape& S,
       MkSw.Build( myReversedEdges, myTapes, myRails,
                   BRepFill_Modified, myContinuity, GeomFill_Location, myDegmax, mySegmax );
       result = MkSw.Shape();
+      myErrorOnSurf = MkSw.ErrorOnSurface();
 
       Handle(TopTools_HArray2OfShape) aSections = MkSw.Sections();
 
@@ -669,6 +681,7 @@ TopoDS_Shape BRepFill_Pipe::MakeShape(const TopoDS_Shape& S,
       MkSw.Build( myReversedEdges, myTapes, myRails,
                   BRepFill_Modified, myContinuity, GeomFill_Location, myDegmax, mySegmax );
       result = MkSw.Shape();
+      myErrorOnSurf = MkSw.ErrorOnSurface();
       //Correct <myFirst> and <myLast>
       ReverseModifiedEdges(myFirst, myReversedEdges);
       ReverseModifiedEdges(myLast, myReversedEdges);

src/BRepFill/BRepFill_PipeShell.cdl

@@ -256,6 +256,9 @@ is
     returns Shape from TopoDS
     is  static;    
     
+    ErrorOnSurface (me)
+    returns Real from Standard;
+    
     FirstShape (me)
     ---Purpose: Returns the  TopoDS  Shape of the bottom of the sweep.
     ---C++: return const & 
@@ -316,6 +319,8 @@ fields
   myTrihedron   :  Trihedron        from  GeomFill;
   myTransition  :  TransitionStyle  from  BRepFill; 
   myStatus      :  PipeError        from  GeomFill;
+  myErrorOnSurf :  Real             from  Standard;
+  
 end PipeShell;
 
 

src/BRepFill/BRepFill_PipeShell.cxx

@@ -773,6 +773,7 @@ void BRepFill_PipeShell::SetForceApproxC1(const Standard_Boolean ForceApproxC1)
 
   if (Ok) {
     myShape = MkSw.Shape();
+    myErrorOnSurf = MkSw.ErrorOnSurface();
 
     TopoDS_Shape aBottomWire = myFirst;
     TopoDS_Shape aTopWire    = myLast;
@@ -879,6 +880,16 @@ const TopoDS_Shape& BRepFill_PipeShell::Shape() const
   return myShape;
 }
 
+//=======================================================================
+//function : ErrorOnSurface
+//purpose  : 
+//=======================================================================
+
+Standard_Real BRepFill_PipeShell::ErrorOnSurface() const 
+{
+  return myErrorOnSurf;
+}
+
 //=======================================================================
 //function : FirstShape
 //purpose  : Return the start section 

src/BRepFill/BRepFill_Sweep.cxx

@@ -2456,8 +2456,13 @@ BRepFill_Sweep::BRepFill_Sweep(const Handle(BRepFill_SectionLaw)& Section,
 				      Vertex(1,ipath+1),
 				      myTol3d);
 	}
- 	else UpdateEdge(TopoDS::Edge(UEdge(isec, ipath)), 
-			S, !exuv, UFirst);
+ 	else
+        {
+          if (UEdge(isec, ipath).IsNull()) //sweep failed
+            return Standard_False;
+          UpdateEdge(TopoDS::Edge(UEdge(isec, ipath)), 
+                     S, !exuv, UFirst);
+        }
      
 	if (uclose && (isec==NbLaw)) {
 	  UpdateEdge(TopoDS::Edge(UEdge(1, ipath)),