Merge commit '39317cf2254b4f139042f134fc7a25b5353da5eb' into hotfixes

Author: thedillonb

CodeHub.Core/ViewModels/Issues/IssueViewModel.cs

@@ -178,7 +178,7 @@ protected override Task Load()
                 .ToBackground(events =>
                 {
                     Events = events;
-                    Participants = events.Select(x => x.Actor.Login).Distinct().Count();
+                    Participants = events.Select(x => x.Actor?.Login).Distinct().Count();
                 });
 
             _applicationService

CodeHub.iOS/ViewControllers/Source/SourceTreeViewController.cs

@@ -230,10 +230,21 @@ private void GoToSourceTree(Octokit.RepositoryContent content)
 
         private void GoToSubModule(Octokit.RepositoryContent content)
         {
+            if (content == null)
+                return;
+
             var gitUrl = content.GitUrl;
-            var nameAndSlug = gitUrl.Substring(gitUrl.IndexOf("/repos/", StringComparison.Ordinal) + 7);
+            if (string.IsNullOrEmpty(gitUrl))
+                return;
+
+            var repoDelimIndex = gitUrl.IndexOf("/repos/", StringComparison.Ordinal);
+            if (repoDelimIndex < 0 || repoDelimIndex + 7 > gitUrl.Length)
+                return;
+
+            var nameAndSlug = gitUrl.Substring(repoDelimIndex + 7);
             var indexOfGit = nameAndSlug.LastIndexOf("/git", StringComparison.Ordinal);
             indexOfGit = indexOfGit < 0 ? 0 : indexOfGit;
+
             var repoId = RepositoryIdentifier.FromFullName(nameAndSlug.Substring(0, indexOfGit));
             if (repoId == null)
                 return;

CodeHub.iOS/Views/Issues/IssueView.cs

@@ -180,7 +180,7 @@ public async Task RenderComments()
 
             var events = ViewModel
                 .Events
-                .Select(x => new Comment(x.Actor.AvatarUrl, x.Actor.Login, CreateEventBody(x.Event.StringValue, x.CommitId), x.CreatedAt));
+                .Select(x => new Comment(x.Actor?.AvatarUrl, x.Actor?.Login, CreateEventBody(x.Event.StringValue, x.CommitId), x.CreatedAt));
 
             var items = comments
                 .Concat(events)