0025706: SIGSEGV after making existing BSplineCurve rational

[occt.git] / src / Geom2d / Geom2d_BSplineCurve.cxx

diff --git a/src/Geom2d/Geom2d_BSplineCurve.cxx b/src/Geom2d/Geom2d_BSplineCurve.cxx
index db9f68e..580beb6 100644 (file)
--- a/src/Geom2d/Geom2d_BSplineCurve.cxx
+++ b/src/Geom2d/Geom2d_BSplineCurve.cxx
@@ -1326,12 +1326,15 @@ void Geom2d_BSplineCurve::ValidateCache(const Standard_Real  Parameter)
   //
   // check if the degree did not change
   //
-  if (cachepoles->Upper() < deg + 1) {
+  if (cachepoles->Upper() < deg + 1)
     cachepoles = new TColgp_HArray1OfPnt2d(1,deg + 1);
-    if (rational) {
-      cacheweights  = new TColStd_HArray1OfReal(1,deg + 1);
-    }
+  if (rational)
+  {
+    if (cacheweights.IsNull() || cacheweights->Upper() < deg + 1)
+     cacheweights  = new TColStd_HArray1OfReal(1,deg + 1);
   }
+  else if (!cacheweights.IsNull())
+    cacheweights.Nullify();
 
   BSplCLib::LocateParameter(deg,
                            (flatknots->Array1()),