1.6-Beta5 (and other versions) incompat with old upgraded project

( Moved from https://github.com/dotnet/cli/issues/4999 )

The error has moved a few line numbers but otherwise persists…

Path: C:\Users\mcmonkey\.vscode\extensions\ms-vscode.csharp-1.6.0-beta5\bin\omnisharp\OmniSharp.exe

[WARNING:OmniSharp#MSBuild] Failed to process project file 'c:\Github\FreneticDocs\FreneticDocs.csproj'.
c:\Github\FreneticDocs\FreneticDocs.csproj(1,1)
System.UriFormatException: Invalid URI: The format of the URI could not be determined.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at Microsoft.Build.Shared.FileUtilities.MakeRelative(String basePath, String path)
   at Microsoft.Build.Evaluation.Evaluator`4.ThrowForImportedProjectWithSearchPathsNotFound(ProjectImportPathMatch searchPathMatch, ProjectImportElement importElement)
   at Microsoft.Build.Evaluation.Evaluator`4.ExpandAndLoadImports(String directoryOfImportingFile, ProjectImportElement importElement)
   at Microsoft.Build.Evaluation.Evaluator`4.EvaluateImportElement(String directoryOfImportingFile, ProjectImportElement importElement)
   at Microsoft.Build.Evaluation.Evaluator`4.PerformDepthFirstPass(ProjectRootElement currentProjectOrImport)
   at Microsoft.Build.Evaluation.Evaluator`4.EvaluateImportElement(String directoryOfImportingFile, ProjectImportElement importElement)
   at Microsoft.Build.Evaluation.Evaluator`4.PerformDepthFirstPass(ProjectRootElement currentProjectOrImport)
   at Microsoft.Build.Evaluation.Evaluator`4.Evaluate()
   at Microsoft.Build.Evaluation.Project.Reevaluate(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.Project.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.Project.Initialize(IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.ProjectCollection.LoadProject(String fileName, IDictionary`2 globalProperties, String toolsVersion)
   at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.Create(String projectFilePath, String solutionDirectory, ILogger logger, MSBuildOptions options, ICollection`1 diagnostics) in C:\Projects\omnisharp-roslyn\src\OmniSharp.MSBuild\ProjectFile\ProjectFileInfo.cs:line 108
   at OmniSharp.MSBuild.MSBuildProjectSystem.CreateProjectFileInfo(String projectFilePath) in C:\Projects\omnisharp-roslyn\src\OmniSharp.MSBuild\MSBuildProjectSystem.cs:line 282

For a bit of background, the project was started on a public release of .NET Core CLI (I believe 1.0.0 Preview 2-1), with a project.json file, then upgraded to .NET Core CLI 1.0.0 Preview 5 to .csproj via dotnet migrate.

It’s an ASP.NET MVC setup. the Csproj file is posted for the original issue at http://pastebin.com/VBxaXzwA

OS is a standard and regularly updated installation of Windows 10.

dotnet --info:

.NET Command Line Tools (1.0.0-preview5-004232)

Product Information:
 Version:            1.0.0-preview5-004232
 Commit SHA-1 hash:  355b6233cb

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.14393
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\1.0.0-preview5-004232

[DustinCampbell]

I verified that my fix is properly in 1.6-beta6 this time.

[DustinCampbell]

Awesome.