From fd612fab8d053235557a52f24f97d59a3f62db03 Mon Sep 17 00:00:00 2001
From: Kris Maglione <maglione.k@gmail.com>
Date: Mon, 3 Oct 2011 15:04:30 -0400
Subject: [PATCH] Fix substring computation issue.

--HG--
extra : rebase_source : b08420e6071d7a574503bc5671e09230a4c9c08a
---
 common/modules/completion.jsm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/modules/completion.jsm b/common/modules/completion.jsm
index 80938646..436bfb95 100644
--- a/common/modules/completion.jsm
+++ b/common/modules/completion.jsm
@@ -554,9 +554,10 @@ var CompletionContext = Class("CompletionContext", {
                 // item's text.
                 let len = substring.length;
                 let i = 0, n = len;
+                let result = item.result;
                 while (n) {
                     let m = Math.floor(n / 2);
-                    let keep = compare(fixCase(item.text), substring.substring(0, i + m));
+                    let keep = i + m && compare(fixCase(result), substring.substring(0, i + m));
                     if (!keep)
                         len = i + m - 1;
                     if (!keep || m == 0)