efcore: Include with a mapped query view with invalid navigation name fails with null object from internal code

I’ve mapped a DbQuery of a non-entity type to a database view. (The true type and db view are named AuthorArticlesCount. I’m calling them AuthorStat here to simplify but the repo I’m linking to uses the longer name.)

public DbQuery<AuthorArticleCount> AuthorArticleCounts{get;set;}

I can run simple LINQ queries successfully.

I then mapped that type as a dependent in a one to one relationship with an entity.

modelBuilder.Query<AuthStat>().HasOne<Author>()
                               .WithOne()
                               .HasForeignKey<AuthorStat>(a=>a.AuthorId); 

Note that there are no navigation properties in Author or AuthorStat. AuthorStat has only AuthorId FK property.

Queries against the query type that include the entity fail. Queries against the entity that include the query type fail. e.g.

`   var results = _context.Authors.Include("AuthorArticleCounts").ToList();

`
The failure is a null reference exception coming from Microsoft.EntityFrameworkCore.Metadata.Internal.EntityTypeExtensions.DisplayName(IEntityType type)

Full repo: https://github.com/julielerman/PublicationsTracker

Further technical details

EF Core version:2.1.0-rc1-final Database Provider: Microsoft.EntityFrameworkCore.Sqlite) Operating system: macOS High Sierra IDE: VS Code 1.21.1