Query: compilation error (NRE) for queries with query types and correlated collection navigation

[maumar]

query:

                var query = ctx.Query<OrderQuery>().Where(ov => ov.CustomerID == "ALFKI").Select(ov => ov.Customer).Select(cv => cv.Orders.Where(cc => true).ToList());
                var result = query.ToList();

exception:

Object reference not set to an instance of an object.
	at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.CorrelatedCollectionOptimizingVisitor.Rewrite(Int32 correlatedCollectionIndex, QueryModel collectionQueryModel, INavigation navigation, Boolean trackingQuery, QuerySourceReferenceExpression originQuerySource, Boolean forceListResult, Type listResultElementType)
	at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.CorrelatedCollectionOptimizingVisitor.TryRewrite(SubQueryExpression subQueryExpression, Boolean forceToListResult, Type listResultElementType, Expression& result)
	at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.Internal.CorrelatedCollectionOptimizingVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
	at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
	at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
	at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.TryOptimizeCorrelatedCollections(QueryModel queryModel)
	at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.VisitSelectClause(SelectClause selectClause, QueryModel queryModel)
	at Microsoft.EntityFrameworkCore.Query.RelationalQueryModelVisitor.VisitSelectClause(SelectClause selectClause, QueryModel queryModel)
	at Remotion.Linq.Clauses.SelectClause.Accept(IQueryModelVisitor visitor, QueryModel queryModel)
	at Remotion.Linq.QueryModelVisitorBase.VisitQueryModel(QueryModel queryModel)
	at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
	at Microsoft.EntityFrameworkCore.Query.RelationalQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
	at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.CreateQueryExecutor[TResult](QueryModel queryModel)
	at Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](QueryModel queryModel)
	--- End of stack trace from previous location where exception was thrown ---
	at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
	at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](Expression query, IQueryModelGenerator queryModelGenerator, IDatabase database, IDiagnosticsLogger`1 logger, Type contextType)
	at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass13_0`1.<Execute>b__0()
	at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
	at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
	at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
	at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
	at Remotion.Linq.QueryableBase`1.GetEnumerator()

Problem is that correlated collection rewrite needs to find primary keys to know how to associate the child with parent, but QueryType doesn't have any keys