ArgumentException when running with exe project

[drewnoakes]

In VS, when you choose "Open project" if you give it the path to a .exe file, it'll create an "exe project" which lets you launch in the debugger.

This causes an exception in VSColorOutput64:

System.ArgumentException: The path is not of a legal form.
   at System.IO.Path.NormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths)
   at System.IO.Path.InternalGetDirectoryName(String path)
   at VSColorOutput.Output.BuildEvents.BuildEvents.SolutionOpened()
   at VSColorOutput.Output.BuildEvents.BuildEvents.Initialize(IServiceProvider serviceProvider)
   at VSColorOutput.Output.BuildEvents.BuildEventsProvider.GetClassifier(ITextBuffer textBuffer)
   at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.InvokeEligibleFactories[TExtensionInstance,TExtensionFactory,TMetadataView](IEnumerable`1 lazyFactories, Func`2 getter, IContentType dataContentType, IContentTypeRegistryService contentTypeRegistryService, Object errorSource)
   at VSColorOutput.Output.BuildEvents.BuildEventsProvider.GetClassifier
   at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.InvokeEligibleFactories
   at Microsoft.VisualStudio.Text.Classification.Implementation.ClassifierTaggerProvider.CreateTagger
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.InstantiateBufferTagger
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.InstantiateOrDeferBufferTagger
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.AddBufferTaggers
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.AddTaggers
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.GatherTaggers
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.RegisterBuffer
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.RegisterSnapshotAndChildren
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.Initialize
   at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregatorFactoryService.CreateTagAggregator
   at Microsoft.VisualStudio.Text.Classification.Implementation.ClassifierAggregator..ctor
   at Microsoft.VisualStudio.Text.Classification.Implementation.ClassifierAggregatorService.GetClassifier
   at Microsoft.VisualStudio.Text.Editor.Implementation.WpfTextView.Initialize
   at Microsoft.VisualStudio.Text.Editor.Implementation.WpfTextEditorFactoryService.InitializeTextView
   at Microsoft.VisualStudio.Editor.Implementation.SimpleTextViewWindow.Init_InitializeWpfTextView
   at Microsoft.VisualStudio.Editor.Implementation.SimpleTextViewWindow.Init_OnActivation
   at Microsoft.VisualStudio.Editor.Implementation.SimpleTextViewWindow.PreOuterQueryStatus
   at Microsoft.VisualStudio.Editor.Implementation.SimpleTextViewWindow.QueryStatus
   at Microsoft.VisualStudio.OLE.Interop.IOleCommandTarget.QueryStatus
   at Microsoft.VisualStudio.OLE.Interop.IOleCommandTarget.QueryStatus
   at Microsoft.VisualStudio.Platform.WindowManagement.DocumentObjectSite.<QueryStatus>g__TryHandleQueryStatus|83_0
   at Microsoft.VisualStudio.Platform.WindowManagement.DocumentObjectSite.QueryStatus
   at Microsoft.VisualStudio.Platform.WindowManagement.WindowFrame.QueryStatus