Migrations :: "Sequence contains no matching element" thrown sometimes when applying migrations

The issue is when I create an index in the migration, in a table that is base class of other entities.

Add-Migration inicial -Force
System.InvalidOperationException: Sequence contains no matching element
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
   at System.Data.Entity.ModelConfiguration.Edm.StorageEntityTypeMappingExtensions.GetPropertyMapping(EntityTypeMapping entityTypeMapping, EdmProperty[] propertyPath)
   at System.Data.Entity.ModelConfiguration.Configuration.Types.EntityTypeConfiguration.<>c__DisplayClass32.<ConfigureIndexes>b__2a(PropertyInfo icp)
   at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer)
   at System.Data.Entity.ModelConfiguration.Configuration.Types.EntityTypeConfiguration.ConfigureIndexes(DbDatabaseMapping mapping, EntityType entityType)
   at System.Data.Entity.ModelConfiguration.Configuration.Types.EntityTypeConfiguration.Configure(EntityType entityType, DbDatabaseMapping databaseMapping, DbProviderManifest providerManifest)
   at System.Data.Entity.ModelConfiguration.Configuration.ModelConfiguration.ConfigureEntityTypes(DbDatabaseMapping databaseMapping, ICollection`1 entitySets, DbProviderManifest providerManifest)
   at System.Data.Entity.ModelConfiguration.Configuration.ModelConfiguration.Configure(DbDatabaseMapping databaseMapping, DbProviderManifest providerManifest)
   at System.Data.Entity.DbModelBuilder.Build(DbProviderManifest providerManifest, DbProviderInfo providerInfo)
   at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
   at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
   at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
   at System.Data.Entity.Internal.LazyInternalContext.get_ModelBeingInitialized()
   at System.Data.Entity.Infrastructure.EdmxWriter.WriteEdmx(DbContext context, XmlWriter writer)
   at System.Data.Entity.Utilities.DbContextExtensions.<>c__DisplayClass1.<GetModel>b__0(XmlWriter w)
   at System.Data.Entity.Utilities.DbContextExtensions.GetModel(Action`1 writeXml)
   at System.Data.Entity.Utilities.DbContextExtensions.GetModel(DbContext context)
   at System.Data.Entity.Migrations.DbMigrator..ctor(DbMigrationsConfiguration configuration, DbContext usersContext, DatabaseExistenceState existenceState, Boolean calledByCreateDatabase)
   at System.Data.Entity.Migrations.DbMigrator..ctor(DbMigrationsConfiguration configuration)
   at System.Data.Entity.Migrations.Design.MigrationScaffolder..ctor(DbMigrationsConfiguration migrationsConfiguration)
   at System.Data.Entity.Migrations.Design.ToolingFacade.ScaffoldRunner.RunCore()
   at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.Run()
Sequence contains no matching element

Steps to reproduce

1. create a project with this code
2. enable migrations
3. add one migration
4. uncomment the line modelBuilder.Entity().HasIndex(x => x.Description).IsUnique();
5. add another migration and the error occur.

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TesteEFIndice
{
    class Program
    {
        static void Main(string[] args)
        {
        }

    }

    [Table("A")]
    public class A
    {
        [Key]
        public int Id { get; set; }
        public string Description { get; set; }
    }
    [Table("A")]
    public class B : A
    {

    }
    [Table("A")]
    public class C : A
    {

    }

    public class Context : DbContext
    {
        public DbSet<A> A { get; set; }
        public DbSet<B> B { get; set; }
        public DbSet<C> C { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {

            //modelBuilder.Entity<A>().HasIndex(x => x.Description).IsUnique();
            base.OnModelCreating(modelBuilder);
        }


    }
}

Further technical details

EF 6.2 Database Provider: Sql Server Operating system: Windows 7 32 bits IDE: Visual Studio 2017 15.7.4

[ajcvickers]

@TechnikEmpire We have not yet done any planning for the next release.

[TechnikEmpire]

@ajcvickers Thanks but I think you meant @Tiberriver256 😃