Test that bare repositories have no index

Author: Edward Thomson

LibGit2Sharp.Tests/RepositoryFixture.cs

@@ -26,6 +26,7 @@ public void CanCreateBareRepo()
                 Assert.Null(repo.Info.WorkingDirectory);
                 Assert.Equal(Path.GetFullPath(repoPath), repo.Info.Path);
                 Assert.True(repo.Info.IsBare);
+                Assert.Throws<BareRepositoryException>(() => { var idx = repo.Index; });
 
                 AssertInitializedRepository(repo, "refs/heads/master");
 

LibGit2Sharp/Repository.cs

@@ -231,7 +231,7 @@ public Index Index
                     throw new BareRepositoryException("Index is not available in a bare repository.");
                 }
 
-                return index.Value;
+                return index != null ? index.Value : null;
             }
         }