From f6c8f51ea8bec8335779fa5fd2f7aed379224c18 Mon Sep 17 00:00:00 2001
From: vsv <vsv@opencascade.com>
Date: Mon, 25 Jun 2018 19:02:47 +0300
Subject: [PATCH] Prevent a crash with non-presentable edge

---
 src/PartSet/PartSet_OperationPrs.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/PartSet/PartSet_OperationPrs.cpp b/src/PartSet/PartSet_OperationPrs.cpp
index 720a0ea9c..50b8cae90 100755
--- a/src/PartSet/PartSet_OperationPrs.cpp
+++ b/src/PartSet/PartSet_OperationPrs.cpp
@@ -141,7 +141,17 @@ void PartSet_OperationPrs::Compute(
         setWidth(aDrawer, aWidth);
       }
     }
-    StdPrs_WFShape::Add(thePresentation, aShape, aDrawer);
+    try {
+      StdPrs_WFShape::Add(thePresentation, aShape, aDrawer);
+    }
+    catch (...) {
+      Events_InfoMessage("PartSet_OperationPrs",
+        "An empty AIS presentation: PartSet_OperationPrs").send();
+      std::shared_ptr<Events_Message> aMsg = std::shared_ptr<Events_Message>(
+        new Events_Message(Events_Loop::eventByName(EVENT_EMPTY_OPERATION_PRESENTATION)));
+      Events_Loop::loop()->send(aMsg);
+      return;
+    }
   }
   Set(aComp);
   if (!aReadyToDisplay) {
-- 
2.39.2