gistfile1.txt

System.ArgumentException: An item with the same key has already been added. Key: writableTypeIdentifiersForItemProvider
  at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x000ab] in /private/tmp/source-mono-d15-3/bockbuild-d15-3/profiles/mono-mac-xamarin/build-root/mono-x64/external/corert/src/System.Private.CoreLib/src/System/Collections/Generic/Dictionary.cs:410 
  at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in /private/tmp/source-mono-d15-3/bockbuild-d15-3/profiles/mono-mac-xamarin/build-root/mono-x64/external/corert/src/System.Private.CoreLib/src/System/Collections/Generic/Dictionary.cs:230 
  at Extrospection.ObjCProtocolCheck.VisitObjCProtocolDecl (Clang.Ast.ObjCProtocolDecl decl, Clang.Ast.VisitKind visitKind) [0x001e0] in /Users/vidondai/Documents/xi-xcode9/xamarin-macios/tests/xtro-sharpie/ObjCProtocolCheck.cs:121 
  at Clang.Ast.ObjCProtocolDecl.Accept (Clang.Ast.AstVisitor visitor) [0x00000] in /Users/builder/vsts/_work/2/s/Clang/Ast/Generated/ObjCProtocolDecl.cs:25 
  at Clang.Ast.DeclContextImpl.Accept (Clang.Ast.IDeclContext declContext, Clang.Ast.AstVisitor visitor) [0x00015] in /Users/builder/vsts/_work/2/s/Clang/Ast/DeclContext.cs:62 
  at Clang.Ast.TranslationUnitDecl.Accept (Clang.Ast.AstVisitor visitor) [0x00008] in /Users/builder/vsts/_work/2/s/Clang/Ast/Generated/TranslationUnitDecl.cs:39 
  at Extrospection.Runner+<>c__DisplayClass1_0.<Execute>b__0 (Clang.Ast.TranslationUnitDecl tu) [0x00014] in /Users/vidondai/Documents/xi-xcode9/xamarin-macios/tests/xtro-sharpie/Runner.cs:48 
  at (wrapper delegate-invoke) System.Action`1[Clang.Ast.TranslationUnitDecl]:invoke_void_T (Clang.Ast.TranslationUnitDecl)
  at Clang.Ast.AstReader.HandleTranslationUnit (Clang.Ast.TranslationUnitDecl translationUnit) [0x00000] in /Users/builder/vsts/_work/2/s/Clang/Ast/AstReader.cs:52 
  at Clang.Ast.AstReader.HandleAstUnit (System.IntPtr astContextHandle, System.IntPtr preprocessorHandle) [0x0001b] in /Users/builder/vsts/_work/2/s/Clang/Ast/AstReader.cs:42 
  at (wrapper managed-to-native) Clang.Ast.AstReader:LoadInternal (Clang.Ast.AstReader,string)
  at Clang.Ast.AstReader.Load (System.String astPath) [0x00014] in /Users/builder/vsts/_work/2/s/Clang/Ast/AstReader.cs:33 
  at Extrospection.Runner.Execute (System.String pchFile, System.Collections.Generic.IEnumerable`1[T] assemblyNames) [0x00186] in /Users/vidondai/Documents/xi-xcode9/xamarin-macios/tests/xtro-sharpie/Runner.cs:52 
  at Extrospection.MainClass.Main (System.String[] args) [0x00046] in /Users/vidondai/Documents/xi-xcode9/xamarin-macios/tests/xtro-sharpie/Program.cs:20