0026016: BRepPrimAPI_MakeRevol crash

Correctly treat the case when the line is a trimmed curve.

Test-case for issue #26016

diff --git a/src/BRepSweep/BRepSweep_Rotation.cxx b/src/BRepSweep/BRepSweep_Rotation.cxx
index 52ad520..1551cc8 100644 (file)
--- a/src/BRepSweep/BRepSweep_Rotation.cxx
+++ b/src/BRepSweep/BRepSweep_Rotation.cxx
@@ -435,8 +435,17 @@ void  BRepSweep_Rotation::SetGeneratingPCurve
   if (AS.GetType()==GeomAbs_Plane){
     gp_Pln pln = AS.Plane();
     gp_Ax3 ax3 = pln.Position();
-    Handle(Geom_Line) GL = Handle(Geom_Line)::DownCast
-      (BRep_Tool::Curve(TopoDS::Edge(aNewEdge),Loc,First,Last));
+    Handle(Geom_Curve) aC = BRep_Tool::Curve(TopoDS::Edge(aNewEdge),Loc,First,Last);
+    Handle(Geom_Line) GL = Handle(Geom_Line)::DownCast(aC);
+    if (GL.IsNull()) {
+      Handle(Geom_TrimmedCurve) aTrimmedCurve = Handle(Geom_TrimmedCurve)::DownCast(aC);
+      if (!aTrimmedCurve.IsNull()) {
+        GL = Handle(Geom_Line)::DownCast(aTrimmedCurve->BasisCurve());
+        if (GL.IsNull()) {
+            Standard_ConstructionError::Raise("BRepSweep_Rotation::SetGeneratingPCurve");
+        }
+      }
+    }
     gp_Lin gl = GL->Lin();
     gl.Transform(Loc.Transformation());
     point = gl.Location();

diff --git a/tests/bugs/modalg_6/bug26016 b/tests/bugs/modalg_6/bug26016
new file mode 100644 (file)
index 0000000..e7610bf
--- /dev/null
+++ b/tests/bugs/modalg_6/bug26016
@@ -0,0 +1,21 @@
+puts "========"
+puts "OCC26016"
+puts "========"
+puts ""
+##@@###########################
+# BRepPrimAPI_MakeRevol crash
+###############################
+
+smallview
+
+restore [locate_data_file OCC26016-revolve-crash.brep] a
+revol r a 0 0 0 0 1 0 90
+set bug_info [checkshape r]
+
+if {[string compare $bug_info "This shape seems to be valid"] != 0} {
+  puts "ERROR: OCC26016 is reproduced"
+}
+
+donly r
+fit
+set only_screen_axo 1