Two runtimeclass with same property name but different type cause cannot convert argument error

[HO-COOH]

Describe the bug

Same with #8994, but WinUI3 C++ project gives a different error.

Steps to reproduce the bug

1. Create a C++ WinUI3 project

2. Update every nuget to latest, I have
   

3. Create two runtimeclass

    [bindable]
    [default_interface]
    runtimeclass MyClass1 
    {
        MyClass1();
        Int32 MyProperty;
    }

    [bindable]
    [default_interface]
    runtimeclass MyClass2 
    {
        MyClass2();
        Object MyProperty;
    }

5. Build project, you get

error C2665: 'winrt::_5_Function_Template_Conflict_WinUI3::implementation::MyClass2::MyProperty': no overloaded function could convert all the argument types
1>(compiling source file '/MyClass2.cpp')
1>C:\Users\Peter\Desktop\WinUI-Bug\5-Function-Template-Conflict\5-Function-Template-Conflict-WinUI3\MyClass2.cpp(14,20):
1>could be 'void winrt::_5_Function_Template_Conflict_WinUI3::implementation::MyClass2::MyProperty(int32_t)'
1>	C:\Users\Peter\Desktop\WinUI-Bug\5-Function-Template-Conflict\5-Function-Template-Conflict-WinUI3\Generated Files\winrt\_5_Function_Template_Conflict_WinUI3.h(94,25):
1>	'void winrt::_5_Function_Template_Conflict_WinUI3::implementation::MyClass2::MyProperty(int32_t)': cannot convert argument 1 from 'const winrt::Windows::Foundation::IInspectable' to 'int32_t'
1>		C:\Users\Peter\Desktop\WinUI-Bug\5-Function-Template-Conflict\5-Function-Template-Conflict-WinUI3\Generated Files\winrt\_5_Function_Template_Conflict_WinUI3.h(94,37):
1>		No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called

Repo here

Expected behavior

Builds fine

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.5.0: 1.5.240227000

Windows version

Windows 10 (1809): Build 17763

Additional context

No response

[codendone]

It looks like your repro specifies Object MyProperty; as the property in the idl file but still specifies int32_t as the type in the .h and .cpp files:

        int32_t MyProperty();
        void MyProperty(int32_t value);

Fixing the code to match the changed property type in the idl should fix the compile issue.

[HO-COOH]

My bad. I have updated the code, and it seems this issue does get fixed for WinUI3. And UWP's issue remains. Please also take a look at #8994 if possible, thanks!