diff --git a/indra/llui/lltextbase.cpp b/indra/llui/lltextbase.cpp
index ebc9ee244e7131733c1e5372629bbfa9f63c97a7..270d5294f9f8076ae25b2c32ed1f918de5f4f09b 100644
--- a/indra/llui/lltextbase.cpp
+++ b/indra/llui/lltextbase.cpp
@@ -3201,7 +3201,23 @@ S32	LLNormalTextSegment::getNumChars(S32 num_pixels, S32 segment_offset, S32 lin
 	LLFontGL::EWordWrapStyle word_wrap_style = (line_offset == 0) 
 		? LLFontGL::WORD_BOUNDARY_IF_POSSIBLE 
 		: LLFontGL::ONLY_WORD_BOUNDARIES;
-	S32 num_chars = mStyle->getFont()->maxDrawableChars(text.c_str() + segment_offset + mStart, 
+	
+	
+	LLWString offsetString(text.c_str() + segment_offset + mStart);
+
+	if(getLength() < segment_offset + mStart)
+	{
+		llerrs << "getLength() < segment_offset + mStart\t getLength()\t" << getLength() << "\tsegment_offset:\t" 
+						<< segment_offset << "\tmStart:\t" << mStart << "\tsegments\t" << mEditor.mSegments.size() << "\tmax_chars\t" << max_chars << llendl;
+	}
+
+	if(offsetString.length() + 1 < max_chars)
+	{
+		llerrs << "offsetString.length() + 1 < max_chars\t max_chars:\t" << max_chars << "\toffsetString.length():\t" << offsetString.length()
+			<< getLength() << "\tsegment_offset:\t" << segment_offset << "\tmStart:\t" << mStart << "\tsegments\t" << mEditor.mSegments.size() << llendl;
+	}
+	
+	S32 num_chars = mStyle->getFont()->maxDrawableChars(offsetString.c_str(), 
 												(F32)num_pixels,
 												max_chars, 
 												word_wrap_style);