Bug 57568 - System.Reflection.Assembly.DefinedTypes throws ReflectionTypeLoadException when using MEF
Summary: System.Reflection.Assembly.DefinedTypes throws ReflectionTypeLoadException wh...
Alias: None
Product: Runtime
Classification: Mono
Component: Reflection ()
Version: 5.0 (2017-02)
Hardware: Macintosh Mac OS
: --- major
Target Milestone: Future Cycle (TBD)
Assignee: Aleksey Kliger
Depends on:
Reported: 2017-06-16 19:49 UTC by Frank A. Krueger
Modified: 2017-07-07 15:54 UTC (History)
4 users (show)

Is this bug a regression?: ---
Last known good build:

Project demonstrating the bug (5.81 KB, application/zip)
2017-06-16 19:49 UTC, Frank A. Krueger

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Description Frank A. Krueger 2017-06-16 19:49:52 UTC
Created attachment 22956 [details]
Project demonstrating the bug

Original bug filed against Roslyn: https://github.com/dotnet/roslyn/issues/20275#issuecomment-309116815


1. Load the attached TestRoslyn solution
2. Restore all the packages
3. Run

Expected: Workspace object is created


System.Reflection.ReflectionTypeLoadException: The classes in the module cannot be loaded.
  at (wrapper managed-to-native) System.Reflection.Assembly:GetTypes (System.Reflection.Assembly,bool)
  at System.Reflection.Assembly.GetTypes () [0x00000] in /private/tmp/source-mono-2017-02/bockbuild-2017-02/profiles/mono-mac-xamarin/build-root/mono-x86/mcs/class/corlib/System.Reflection/Assembly.cs:410 
  at System.Reflection.Assembly+<get_DefinedTypes>d__150.MoveNext () [0x0001e] in /private/tmp/source-mono-2017-02/bockbuild-2017-02/profiles/mono-mac-xamarin/build-root/mono-x86/mcs/class/corlib/System.Reflection/Assembly.cs:1019 
  at System.Linq.Enumerable+SelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00029] in /private/tmp/source-mono-2017-02/bockbuild-2017-02/profiles/mono-mac-xamarin/build-root/mono-x86/external/corefx/src/System.Linq/src/System/Linq/Select.cs:133 
  at System.Linq.Enumerable+SelectManySingleSelectorIterator`2[TSource,TResult].MoveNext () [0x0006f] in /private/tmp/source-mono-2017-02/bockbuild-2017-02/profiles/mono-mac-xamarin/build-root/mono-x86/external/corefx/src/System.Linq/src/System/Linq/SelectMany.cs:209 
  at System.Composition.TypedParts.TypedPartExportDescriptorProvider..ctor (System.Collections.Generic.IEnumerable`1[T] types, System.Composition.Convention.AttributedModelProvider attributeContext) [0x00049] in <c091afde214c4b8e8efbbeb9d44062d4>:0 
  at System.Composition.Hosting.ContainerConfiguration.CreateContainer () [0x00042] in <c091afde214c4b8e8efbbeb9d44062d4>:0 
  at Microsoft.CodeAnalysis.Host.Mef.MefHostServices.Create (System.Collections.Generic.IEnumerable`1[T] assemblies) [0x0001e] in <7f0d4b9d7a9a40cfa302b8c61f11defa>:0 
  at Microsoft.CodeAnalysis.Host.Mef.DesktopMefHostServices.get_DefaultServices () [0x00011] in <43494904657a4fb99e35e930a2c70ef9>:0 
  at Microsoft.CodeAnalysis.MSBuild.MSBuildWorkspace.Create (System.Collections.Generic.IDictionary`2[TKey,TValue] properties) [0x00000] in <43494904657a4fb99e35e930a2c70ef9>:0 
  at Microsoft.CodeAnalysis.MSBuild.MSBuildWorkspace.Create () [0x00000] in <43494904657a4fb99e35e930a2c70ef9>:0 
  at TestRoslyn.MainClass.Main (System.String[] args) [0x00001] in /Users/fak/Projects/TestRoslyn/Program.cs:11 

Mono JIT compiler version (2017-02/5077205 Thu May 18 16:11:37 EDT 2017)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           normal
	SIGSEGV:       altstack
	Notification:  kqueue
	Architecture:  x86
	Disabled:      none
	Misc:          softdebug 
	LLVM:          yes(3.6.0svn-mono-master/8b1520c)
	GC:            sgen (concurrent by default)
Comment 1 Zoltan Varga 2017-06-19 18:45:33 UTC
Running with MONO_LOG_LEVEL=debug prints this:

Mono: The following assembly referenced from /Users/vargaz/Projects/57568/TestRoslyn/bin/Debug/Microsoft.CodeAnalysis.Workspaces.Desktop.dll could not be loaded:
     Assembly:   Microsoft.Build.Tasks.Core    (assemblyref_index=9)
     Public Key: b03f5f7f11d50a3a
The assembly was not found in the Global Assembly Cache, a path listed in the MONO_PATH environment variable, or in the location of the executing assembly (/Users/vargaz/Projects/57568/TestRoslyn/bin/Debug/).
Comment 2 Ludovic Henry 2017-07-05 19:10:15 UTC
Aleksey, could you please take a look at that? It seems to be a missing library from the GAC. Thank you!
Comment 3 Aleksey Kliger 2017-07-05 19:32:04 UTC
The version I see in the GAC is the key is right, but the version is wrong.  There's either a missing .config file with a version remap, or we're not reading one somehow.  Does this project work under .NETFramework?
Comment 4 Aleksey Kliger 2017-07-07 15:54:43 UTC

This seems like a combination of a packaging issue for Microsoft.CodeAnalysis (missing package references to Microsoft.Build and Microsoft.Build.Tasks.Core) and the fact that  Microsoft.CodeAnalysis.Workspaces.Desktop references Microsoft.VisualStudio.RemoteControl which is not supported by Mono.

Please reopen or file a new bug if there's anything to be done on the Mono side in the future or if I misunderstood the situation.