1 files changed, 10 insertions, 1 deletions

diff --git a/linden/indra/llui/lllineeditor.cpp b/linden/indra/llui/lllineeditor.cpp
index e73b287..a3785e4 100644
--- a/linden/indra/llui/lllineeditor.cpp
+++ b/linden/indra/llui/lllineeditor.cpp
@@ -416,7 +416,16 @@ void LLLineEditor::setText(const LLStringExplicit &new_text)
         setCursor(llmin((S32)mText.length(), getCursor()));
 
         // Set current history line to end of history.
-        mCurrentHistoryLine = mLineHistory.end() - 1;
+        // RC Fix, its really not safe to just take 1 of the end itterator, if end==begin
+        // that leaves an invalid state upseting the secure STL checks
+        if(mLineHistory.empty())
+        {
+                mCurrentHistoryLine = mLineHistory.begin();
+        }
+        else
+        {
+                mCurrentHistoryLine = mLineHistory.end() - 1;
+        }
 
         mPrevText = mText;
 }