diff --git a/LibGit2Sharp.Tests/FilterFixture.cs b/LibGit2Sharp.Tests/FilterFixture.cs
index 1de81595d..b0480256a 100644
--- a/LibGit2Sharp.Tests/FilterFixture.cs
+++ b/LibGit2Sharp.Tests/FilterFixture.cs
@@ -304,7 +304,7 @@ private FileInfo CheckoutFileForSmudge(string repoPath, string branchName, strin
         private static FileInfo CommitFileOnBranch(Repository repo, string branchName, String content)
         {
             var branch = repo.CreateBranch(branchName);
-            repo.Checkout(branch.Name);
+            repo.Checkout(branch.FriendlyName);
 
             FileInfo expectedPath = StageNewFile(repo, content);
             repo.Commit("Commit");
diff --git a/LibGit2Sharp.Tests/FilterSubstitutionCipherFixture.cs b/LibGit2Sharp.Tests/FilterSubstitutionCipherFixture.cs
index b2610a574..1ef2f47a1 100644
--- a/LibGit2Sharp.Tests/FilterSubstitutionCipherFixture.cs
+++ b/LibGit2Sharp.Tests/FilterSubstitutionCipherFixture.cs
@@ -35,7 +35,7 @@ public void SmugdeIsNotCalledForFileWhichDoesNotMatchAnAttributeEntry()
                 Assert.Equal(0, filter.SmudgeCalledCount);
 
                 var branch = repo.CreateBranch("delete-files");
-                repo.Checkout(branch.Name);
+                repo.Checkout(branch.FriendlyName);
 
                 DeleteFile(repo, fileName);
 
@@ -75,7 +75,7 @@ public void CorrectlyEncodesAndDecodesInput()
                 Assert.Equal(0, filter.SmudgeCalledCount);
 
                 var branch = repo.CreateBranch("delete-files");
-                repo.Checkout(branch.Name);
+                repo.Checkout(branch.FriendlyName);
 
                 DeleteFile(repo, fileName);
 
@@ -181,7 +181,7 @@ public void SmudgeIsCalledIfAttributeEntryMatches(string filterAttribute, string
                 CommitOnBranchAndReturnDatabaseBlob(repo, fileName, decodedInput);
 
                 var branch = repo.CreateBranch("delete-files");
-                repo.Checkout(branch.Name);
+                repo.Checkout(branch.FriendlyName);
 
                 DeleteFile(repo, fileName);
 
diff --git a/LibGit2Sharp/Core/Ensure.cs b/LibGit2Sharp/Core/Ensure.cs
index b051c8505..04303ca3d 100644
--- a/LibGit2Sharp/Core/Ensure.cs
+++ b/LibGit2Sharp/Core/Ensure.cs
@@ -250,44 +250,21 @@ public static void ArgumentPositiveInt32(long argumentValue, string argumentName
         /// <param name="identifier">The <see cref="GitObject"/> identifier to examine.</param>
         public static void GitObjectIsNotNull(GitObject gitObject, string identifier)
         {
-            Func<string, LibGit2SharpException> exceptionBuilder;
-
-            if (string.Equals("HEAD", identifier, StringComparison.Ordinal))
-            {
-                exceptionBuilder = m => new UnbornBranchException(m);
-            }
-            else
+            if (gitObject != null)
             {
-                exceptionBuilder = m => new NotFoundException(m);
+                return;
             }
 
-            GitObjectIsNotNull(gitObject, identifier, exceptionBuilder);
-        }
-
+            var message = string.Format(CultureInfo.InvariantCulture,
+                "No valid git object identified by '{0}' exists in the repository.",
+                identifier);
 
-        /// <summary>
-        /// Check that the result of a C call that returns a non-null GitObject
-        /// using the default exception builder.
-        /// <para>
-        ///   The native function is expected to return a valid object value.
-        /// </para>
-        /// </summary>
-        /// <param name="gitObject">The <see cref="GitObject"/> to examine.</param>
-        /// <param name="identifier">The <see cref="GitObject"/> identifier to examine.</param>
-        /// <param name="exceptionBuilder">The builder which constructs an <see cref="LibGit2SharpException"/> from a message.</param>
-        public static void GitObjectIsNotNull(
-            GitObject gitObject,
-            string identifier,
-            Func<string, LibGit2SharpException> exceptionBuilder)
-        {
-            if (gitObject != null)
+            if (string.Equals("HEAD", identifier, StringComparison.Ordinal))
             {
-                return;
+                throw new UnbornBranchException(message);
             }
 
-            throw exceptionBuilder(string.Format(CultureInfo.InvariantCulture,
-                                                     "No valid git object identified by '{0}' exists in the repository.",
-                                                     identifier));
+            throw new NotFoundException(message);
         }
     }
 }
diff --git a/LibGit2Sharp/Repository.cs b/LibGit2Sharp/Repository.cs
index 030a79829..77e928f38 100644
--- a/LibGit2Sharp/Repository.cs
+++ b/LibGit2Sharp/Repository.cs
@@ -1006,14 +1006,17 @@ public void CheckoutPaths(string committishOrBranchSpec, IEnumerable<string> pat
             Ensure.ArgumentNotNullOrEmptyString(committishOrBranchSpec, "committishOrBranchSpec");
             Ensure.ArgumentNotNull(paths, "paths");
 
+            var listOfPaths = paths.ToList();
+
             // If there are no paths, then there is nothing to do.
-            if (!paths.Any())
+            if (listOfPaths.Count == 0)
             {
                 return;
             }
 
             Commit commit = LookupCommit(committishOrBranchSpec);
-            CheckoutTree(commit.Tree, paths.ToList(), checkoutOptions ?? new CheckoutOptions());
+
+            CheckoutTree(commit.Tree, listOfPaths, checkoutOptions ?? new CheckoutOptions());
         }
 
         /// <summary>
diff --git a/LibGit2Sharp/RepositoryExtensions.cs b/LibGit2Sharp/RepositoryExtensions.cs
index 922ff82cd..57f7b8601 100644
--- a/LibGit2Sharp/RepositoryExtensions.cs
+++ b/LibGit2Sharp/RepositoryExtensions.cs
@@ -98,7 +98,7 @@ private static Commit RetrieveHeadCommit(IRepository repository)
         {
             Commit commit = repository.Head.Tip;
 
-            Ensure.GitObjectIsNotNull(commit, "HEAD", m => new UnbornBranchException(m));
+            Ensure.GitObjectIsNotNull(commit, "HEAD");
 
             return commit;
         }
diff --git a/README.md b/README.md
index b3dd52d5f..0c0b0fe10 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,7 @@
  [twitter]: http://twitter.com/libgit2sharp
 
 ## Current project build status
+
 The CI builds are generously hosted and run on the [Travis][travis] and [AppVeyor][appveyor] infrastructures.
 
 |  | Windows (x86/amd64) | Linux/Mac OS X |
@@ -35,9 +36,17 @@ The CI builds are generously hosted and run on the [Travis][travis] and [AppVeyo
 | **master** | [![master win][master-win-badge]][master-win] | [![master nix][master-nix-badge]][master-nix] |
 | **vNext** | [![vNext win][vNext-win-badge]][vNext-win] | [![vNext nix][vNext-nix-badge]][vNext-nix] |
 
+The security oriented static code analysis is kindly run through the [Coverity][coverity] service.
+
+|       | Analysis result |
+|-------|-----------------|
+| **vNext** |  [![coverity][coverity-badge]][coverity-project] |
+
 
- [travis]: http://travis-ci.org/
+ [travis]: https://travis-ci.org/
  [appveyor]: http://appveyor.com/
+ [coverity]: https://scan.coverity.com/
+
  [master-win-badge]: https://ci.appveyor.com/api/projects/status/8qxcoqdo9kp7x2w9/branch/master?svg=true
  [master-win]: https://ci.appveyor.com/project/libgit2/libgit2sharp/branch/master
  [master-nix-badge]: https://travis-ci.org/libgit2/libgit2sharp.svg?branch=master
@@ -47,6 +56,9 @@ The CI builds are generously hosted and run on the [Travis][travis] and [AppVeyo
  [vNext-nix-badge]: https://travis-ci.org/libgit2/libgit2sharp.svg?branch=vNext
  [vNext-nix]: https://travis-ci.org/libgit2/libgit2sharp/branches
 
+ [coverity-project]: https://scan.coverity.com/projects/2088
+ [coverity-badge]: https://scan.coverity.com/projects/2088/badge.svg
+
 ## Quick contributing guide
 
  - Fork and clone locally