From af11e35fcb150013d3198b02820355ab803d3daf Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 10 Jun 2016 12:44:26 +0100
Subject: [PATCH] Fixed invalidated iterator bug pick up by Coverity.

---
 src/osgSim/ElevationSlice.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/osgSim/ElevationSlice.cpp b/src/osgSim/ElevationSlice.cpp
index 130482a38..bdc4f193a 100644
--- a/src/osgSim/ElevationSlice.cpp
+++ b/src/osgSim/ElevationSlice.cpp
@@ -456,7 +456,7 @@ struct LineConstructor
 
         for(SegmentSet::iterator itr = _segments.begin();
             itr != _segments.end();
-            ++itr)
+            ) // itr increment is done manually at end of loop
         {
             SegmentSet::iterator nextItr = itr;
             ++nextItr;
@@ -1056,6 +1056,9 @@ struct LineConstructor
 
                 classification = ((itr != _segments.end()) && (nextItr != _segments.end())) ?  itr->compare(*nextItr) : Segment::UNCLASSIFIED;
             }
+
+            // increment iterator it it's not already at end of container.
+            if (itr!=_segments.end()) ++itr;
         }
     }