ArgumentNullException in MSBuildInferredSchema

[KirillOsenkov]

<Project>

  <ItemGroup>
    <None Include="*.txt">
      <Link>Sub\%(Filename)%(Extension)</Link>
    </None>
  </ItemGroup>

</Project>

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System.ArgumentNullException: Value cannot be null.
Parameter name: obj
   at int OrdinalComparer.GetHashCode(string obj)
   at int MonoDevelop.MSBuild.Language.MSBuildInferredSchema+MetadataTupleComparer.GetHashCode((string itemName, string name) obj) in C:/MonoDevelop.MSBuildEditor/MonoDevelop.MSBuild/Language/MSBuildInferredSchema.cs:line 74
   at int System.Collections.Generic.Dictionary<TKey, TValue>.FindEntry(TKey key)
   at bool System.Collections.Generic.Dictionary<TKey, TValue>.ContainsKey(TKey key)
   at bool MonoDevelop.MSBuild.Language.MSBuildInferredSchema.ContainsInfo(ISymbol info) in C:/MonoDevelop.MSBuildEditor/MonoDevelop.MSBuild/Language/MSBuildInferredSchema.cs:line 56
   at IEnumerable<string> MonoDevelop.MSBuild.Language.MSBuildDocument.GetDescendedDocumentsReferencingSymbol(ISymbol info) in C:/MonoDevelop.MSBuildEditor/MonoDevelop.MSBuild/Language/MSBuildDocument.cs:line 368
   at ContainerElement MonoDevelop.MSBuild.Editor.DisplayElementFactory.GetSeenInElement(ITextBuffer buffer, MSBuildResolveResult rr, ISymbol info, MSBuildRootDocument doc) in C:/MonoDevelop.MSBuildEditor/MonoDevelop.MSBuild.Editor/DisplayElementFactory.cs:line 200
   at async Task<object> MonoDevelop.MSBuild.Editor.DisplayElementFactory.GetInfoTooltipElement(ITextBuffer buffer, MSBuildRootDocument doc, ISymbol info, MSBuildResolveResult rr, bool includeDeprecationMessage, CancellationToken token) in C:/MonoDevelop.MSBuildEditor/MonoDevelop.MSBuild.Editor/DisplayElementFactory.cs:line 115
   at async Task<QuickInfoItem> MonoDevelop.MSBuild.Editor.QuickInfo.MSBuildQuickInfoSource.GetQuickInfoItemAsyncInternal(IAsyncQuickInfoSession session, CancellationToken cancellationToken) in C:/MonoDevelop.MSBuildEditor/MonoDevelop.MSBuild.Editor/QuickInfo/MSBuildQuickInfoSource.cs:line 78