Computed read-only properties causing RMG066 warning

[RichardD2]

Describe the bug
Creating a mapping between two entities, both of which contain the same read-only computed property of a nullable value type, produces an erroneous RMG066 warning.

Declaration code

namespace Db
{
    public class Foo
    {
        public int? CategoryId { get; set; }
        public bool? IsSpecialCategory => CategoryId == 42;
    }
}

namespace Dto
{
    public class Foo
    {
        public int? CategoryId { get; set; }
        public bool? IsSpecialCategory => CategoryId == 42;
    }
}

namespace Mapping
{
    [Mapper]
    public static partial class FooMapping
    {
        public static partial Dto.Foo MapToDto(this Db.Foo source);
    }
}

Actual relevant generated code

namespace Mapping
{
    public static partial class FooMapping
    {
        [global::System.CodeDom.Compiler.GeneratedCode("Riok.Mapperly", "3.6.0.0")]
        public static partial global::Dto.Foo MapToDto(global::Db.Foo source)
        {
            var target = new global::Dto.Foo();
            target.CategoryId = source.CategoryId;
            return target;
        }
    }
}

Expected relevant generated code
The actual generated code is correct. However, the mapping is flagged with:

RMG066 No members are mapped in the object mapping from bool? to bool?

Environment (please complete the following information):

• Mapperly Version: 3.6.0
• Nullable reference types: enabled
• .NET Version: .NET 8.0.303
• Target Framework: .net8.0
• Compiler Version: 4.10.0-3.24324.8 (04fb3916)
• C# Language Version: 12.0
• IDE: Visual Studio v17.10.4
• OS: Windows 11 23H2

Additional context
Explicitly adding a MapperIgnoreSource for the computed property makes the warning go away:

[Mapper]
public static partial class FooMapping
{
    [MapperIgnoreSource(nameof(Db.Foo.IsSpecialCategory))]
    public static partial Dto.Foo MapToDto(this Db.Foo source);
}

[latonz]

Thanks for reporting. I cannot reproduce the RMG066, I always get RMG020 for Value and HasValue of the bool? (which isn't optimal either). Do you have any properties set on the MapperAttribute or do you have a MapperDefaultsAttribute for your assembly?

[RichardD2]

No additional settings. I'm getting the two RMG020 hints and the RMG066 warning with just the code shown.

I've attached the sample project I'm using:
Mapperly1402.zip