Multiple enumerations of IEnumerable<SqlDataRecord> passed as TVP

Looks like Dapper twice enumerates IEnumerable passed as TVP

var numbers = GenerateNumbers(3);
BulkInsert(numbers);

static IEnumerable<int> GenerateNumbers(int count)
{
    for (int i = 0; i < count; i++)
    {
        Console.WriteLine(i);
        yield return i;
    }
}

void BulkInsert(IEnumerable<int> numbers)
{
    var records = numbers.Select(x => MapToSqlDataRecord(x));
    var sql = @"INSERT INTO [Test] (Id) SELECT Id FROM @tvp;";

    using (var connection = new SqlConnection(connectionString))
    {
        connection.Execute(sql, new { tvp = records.AsTableValuedParameter("dbo.TestType") });
    }
}

static SqlDataRecord MapToSqlDataRecord(int i)
{
    var record = new SqlDataRecord(
        new SqlMetaData("Id", SqlDbType.Int)
    );
    record.SetInt32(0, i);
    return record;
}

this code writes to console
0
0
1
2

and if I pass enumerable from database it throws exception because can not open second reader on same connection (same enumerable works fine using ADO.Net)

I believe this is the first enumeration

Start with the AsTableValuedParameter and Execute path shown in the issue, then reproduce the sample with GenerateNumbers and SqlDataRecord. Trace where the TVP records are enumerated and verify the database-backed enumerable case; done means the records are consumed once without opening a second reader.