From 8f02d52c15bcdfa1c65323ba33d0d03f9483dd86 Mon Sep 17 00:00:00 2001
From: vsv <vsv@opencascade.com>
Date: Tue, 18 Sep 2018 18:32:15 +0300
Subject: [PATCH] Issue #2633: Avoid crash on viewer operations when viewer is
 closed

---
 src/SHAPERGUI/SHAPERGUI_SalomeViewer.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/SHAPERGUI/SHAPERGUI_SalomeViewer.cpp b/src/SHAPERGUI/SHAPERGUI_SalomeViewer.cpp
index 37148b5a3..58cb99b4c 100644
--- a/src/SHAPERGUI/SHAPERGUI_SalomeViewer.cpp
+++ b/src/SHAPERGUI/SHAPERGUI_SalomeViewer.cpp
@@ -376,6 +376,8 @@ void SHAPERGUI_SalomeViewer::fitAll()
 void SHAPERGUI_SalomeViewer::eraseAll()
 {
   Handle(AIS_InteractiveContext) aContext = AISContext();
+  if (aContext.IsNull())
+    return;
   AIS_ListOfInteractive aList;
   aContext->DisplayedObjects(aList);
   AIS_ListIteratorOfListOfInteractive aLIt;
-- 
2.39.2