FatalExecutionEngineError when using struct and SqlMapper on 1.50.2

[Freakazoid182]

Since updating to 1.50.2 i'm getting an error with mapping to structs using SqlMapper

FatalExecutionEngineError occurred
  HResult=-2146233082
  Message=Exception of type 'System.ExecutionEngineException' was thrown.
  InnerException: 

I was able to reproduce this is a very simple scenario in a console application:

var connection = new SqlConnection("Server=localhost;Database=TestDb;User Id=user;Password=password;");

var sql = "SELECT * FROM Dogs WHERE Id = @Id";

var result = SqlMapper.Query<Dog, SubData, Dog>(connection, sql, (dog, subdata) =>
  {
    dog.subData = subdata;
    return dog;
  }, new { Id = 1 }, splitOn: "Age");

Model definitions:

public class Dog
{
  public int Id { get; set; }
  public string Name { get; set; }
  public SubData subData { get; set; }
}

public struct SubData
{
  public int Age { get; set; }
  public int Breed { get; set; }
}

The SQL-table is just 4 columns (nothing fancy)

Id (bigint)
Name (nvarchar(50)
Age (int)
Breed (int)

I tried debugging SqlMapper.cs and found the exception is thrown in the SqlMapper.GenerateMapper method. Actually when trying to execute the Func:

((Func<TFirst, TSecond, TReturn>)map)((TFirst)deserializer(r), (TSecond)otherDeserializers[0](r));

When I remove the Breed property from the struct, it does work. So it seems to break when the struct contains more than one property.

I'm not sure how to look any further into this.
Does anyone have any idea what this could be?

Same issue on 1.50.0
1.40.0 all working fine.

[Freakazoid182]

I think this relates to issue #606.

For anyone looking for a workaround: I just let SqlMapper map to a intermediate class in stead of the struct. Then manually map to the struct in the Func.