0025523: Fail to read back solid written to STEP

Fixed a exception occurred during reading step file

Test case for issue CR25523

src/StepToTopoDS/StepToTopoDS_TranslateEdgeLoop.cxx

@@ -88,6 +88,7 @@
 #include <ShapeAlgo_ToolContainer.hxx>
 #include <XSAlgo.hxx>
 #include <XSAlgo_AlgoContainer.hxx>
+#include <ElCLib.hxx>
 
 // ============================================================================
 // Method  : RemoveSinglePCurve
@@ -163,6 +164,17 @@ static void CheckPCurves (TopoDS_Wire& aWire, const TopoDS_Face& aFace,
       B.Range(myEdge, aFace, w1, cl);      
       w2 = cf;
     }
+
+    if (w1 > w2 && mySurf->IsUPeriodic())
+    {
+      Standard_Real u1,u2,v1,v2;
+      mySurf->Bounds(u1,u2,v1,v2);
+      ElCLib::AdjustPeriodic(u1, u2, 
+        Min(Abs(w2-w1)/2,Precision::PConfusion()), 
+        w1, w2);
+      B.Range(myEdge, aFace, w1, w2);   
+    }
+
     
     // advanced check
     XSAlgo::AlgoContainer()->CheckPCurve (myEdge, aFace, preci, sbwd->IsSeam(i) );

tests/bugs/step/bug25523

@@ -0,0 +1,46 @@
+puts "============"
+puts "OCC25523"
+puts "============"
+puts ""
+#######################################################################
+# Fail to read back solid written to STEP
+#######################################################################
+
+restore [locate_data_file bug25523_bad_loopback_step.brep] a
+nbshapes a
+
+set nbshapes_expected "
+Number of shapes in a
+ VERTEX    : 30
+ EDGE      : 54
+ WIRE      : 32
+ FACE      : 27
+ SHELL     : 1
+ SOLID     : 1
+ COMPSOLID : 0
+ COMPOUND  : 0
+ SHAPE     : 145
+"
+checknbshapes a ${nbshapes_expected} 0 "Stator model"
+
+newmodel
+set aFile ${imagedir}/bug25523.stp
+catch { file delete ${aFile} }
+
+stepwrite a a ${aFile}
+
+stepread ${aFile} b *
+nbshapes b_1 ;# empty compound
+checknbshapes b_1 ${nbshapes_expected} 0 "Stator model"
+
+tpstat c ;# reports exception
+
+vinit View1
+vdisplay a
+vfit
+vdump ${imagedir}/${casename}_1.png
+
+vinit View2
+vdisplay b_1
+vfit
+vdump ${imagedir}/${casename}_2.png