From 91826b66ee694463fcbb0005cfa23f746f8ebb82 Mon Sep 17 00:00:00 2001
From: Unknown <leino@LEINO6.redmond.corp.microsoft.com>
Date: Tue, 14 Aug 2012 15:42:25 -0700
Subject: Dafny: two bug fixes (resolution crashing on bad input,
 DafnyExtension crashing after certain deletes)

---
 Util/VS2010/DafnyExtension/DafnyExtension/OutliningTagger.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Util')

diff --git a/Util/VS2010/DafnyExtension/DafnyExtension/OutliningTagger.cs b/Util/VS2010/DafnyExtension/DafnyExtension/OutliningTagger.cs
index 86a53460..e51e9887 100644
--- a/Util/VS2010/DafnyExtension/DafnyExtension/OutliningTagger.cs
+++ b/Util/VS2010/DafnyExtension/DafnyExtension/OutliningTagger.cs
@@ -78,7 +78,7 @@ namespace DafnyLanguage
       if (start == end) yield break;
 
       foreach (var r in _regions) {
-        if (r.Start <= end && start <= r.Start + r.Length) {
+        if (0 <= r.Length && r.Start <= end && start <= r.Start + r.Length) {
           yield return new TagSpan<OutliningRegionTag>(
             new SnapshotSpan(_snapshot, r.Start, r.Length),
             new OutliningRegionTag(false, false, "...", r.HoverText));
-- 
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