c++visual-studio-2015windows-10-universalc++-cxwack

UWP: WACK test failing on Windows Runtime metadata validation

I have a C# app targeting Windows-10 desktop platform.The C# app calls into native component written in C++. My native C++ code has Visual C++ component extensions(C++/CX).
I am trying to run WACK test for my app & I am seeing this error:

Error Found: The general metadata correctness test detected the following errors: The overloaded method XXX in yyy.winmd have the same number of in parameters without one that has DefaultOverloadAttribute. Exactly one method overload must have DefaultOverloadAttribute
Impact if not fixed: Windows store doesnt allow apps that don't pass Windows Runtime Metadata Validation.
How to fix: Please ensure that the compiler you are using to generate your Windows Runtime types is up to date with the Windows Runtime specifications

This used to work fine with VS-2015 Update 2. I installed VS-2015 Update-3 today & from then I am seeing this failure.
The strange thing is that the overloaded method mentioned in the Error Report is not overloaded at all.
I have checked this MSDN page but couldnt find any solution.
My VS details are as follows:

MS VS Professional 2015
Version 14.0.25425.01 Update 3
MS .NET Framework
Version 4.6.01038

I couldnt find any Windows Runtime Specifications anywhere. Do I need to anything additional after installing VS Update-3 ?

Solution

  • This seems to be a VS compiler issue. Basically WACK tool is complaining about any user defined method name "Close"


    The compiler adds an IClosable implementation whenever user defined ref class has an explicit destructor. It then maps the destructor to "IClosable::Close" method. But the compiler is not complaining about user defined method named "Close".


    On further digging, I found that SQLite also seem to have similar issues. This is exactly the issue which I am hitting as well.
    This is the solution employed by SQLite.
    After looking at the SQLite solution, I then modified my method name from "Close" to "Closedb" and now my WACK tests pass.
    As of this posting the only resolution for this issue seems like not to have a method named "Close" in your code.