From 8cdd9b7678b928610b7cd422eca196463d0cb138 Mon Sep 17 00:00:00 2001
From: nyamatongwe <unknown>
Date: Fri, 5 Apr 2013 17:19:30 +1100
Subject: Fix crash in 64-bit builds due to unsigned underflow.

---
 lexers/LexRuby.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lexers/LexRuby.cxx b/lexers/LexRuby.cxx
index 40424aabd..ce75ed68d 100644
--- a/lexers/LexRuby.cxx
+++ b/lexers/LexRuby.cxx
@@ -119,7 +119,7 @@ static int ClassifyWordRb(unsigned int start, unsigned int end, WordList &keywor
 		chAttr = SCE_RB_MODULE_NAME;
 	else if (0 == strcmp(prevWord, "def"))
 		chAttr = SCE_RB_DEFNAME;
-    else if (keywords.InList(s) && !followsDot(start - 1, styler)) {
+    else if (keywords.InList(s) && ((start == 0) || !followsDot(start - 1, styler))) {
         if (keywordIsAmbiguous(s)
             && keywordIsModifier(s, start, styler)) {
 
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