From 175b357b21c61e0fd1331f5d982c64f1044c223f Mon Sep 17 00:00:00 2001
From: vsr <vsr@opencascade.com>
Date: Tue, 26 Mar 2019 14:38:44 +0300
Subject: [PATCH] Avoid SIGSEGV in case of incorrectly recorded command dump
 processing

---
 src/GEOM/GEOM_Engine.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/GEOM/GEOM_Engine.cxx b/src/GEOM/GEOM_Engine.cxx
index 8eacebc5a..bbd3f5589 100644
--- a/src/GEOM/GEOM_Engine.cxx
+++ b/src/GEOM/GEOM_Engine.cxx
@@ -1415,6 +1415,8 @@ void ReplaceVariables(TCollection_AsciiString& theCommand,
         aStartPos = aCommand.Location(i-1, COMMA, 1, aCommand.Length()) + 2;
         aEndPos = aCommand.Location(i, COMMA, 1, aCommand.Length());
       }
+      if (aStartPos == 0 || aEndPos == 0)
+        continue;
 
       if( aCommand.Value( aStartPos ) == O_SQR_BRACKET )
         aStartPos++;
-- 
2.39.2