Model configuration: Properties not always lifted correctly when using derived classes

[HappyNomad]

This issue can be reproduced by trying to create a database using this context and model:

public class BloggingContext : DbContext
{
    public BloggingContext( DbContextOptions<BloggingContext> options )
        : base( options ) { }

    public DbSet<A> As { get; set; }
}

public class A
{
    public int ID { get; set; }
    public L M3 { get; set; }
    public IList<PBase> Ls { get; set; }
    public MT M2 { get; set; }
    public M M1 { get; set; }
}

public class C : OT { }

public class MT
{
    public int ID { get; set; }
    public IList<ST> STs { get; set; }
    public IList<OGT> OGs { get; set; }
}

public class M
{
    public int ID { get; set; }
    public IList<S> Ss { get; set; }
}

public class ST : P
{
    public C DC { get; set; }
}

public class OGT : P
{
    public IList<OT> Os { get; set; }
}

public class S
{
    public int ID { get; set; }
    public ST Type { get; set; }
}

public class OT : P { }

public class L
{
    public int ID { get; set; }
    public IList<T> Ts { get; set; }
}

public class T : P
{
    public P P { get; set; }
    public Q F { get; set; }
}

public class P : PBase { }

public class Q : PBase { }

public abstract class PBase
{
    public int ID { get; set; }
    public string Stuff { get; set; }
}

The exception text says, "The type 'OT' cannot have base type 'P' because both types include the properties: ID, Stuff."

[HappyNomad]

@rowanmiller Thanks for acknowledging this as a bug. Another likely incorrect exception that occurs upon feeding EF-Core my domain model is described in #6792. I've edited my comment there to include a context and model that reproduces the issue. Please note that both of these are blocking issues for me.

[AndriySvyryd]

Fixed in b689f18