I get "Internal error 2011090501" when trying to specialize this class:

  TBlob = class

  private
    FxMin: Integer;
    FxMax: Integer;
    FyMin: Integer;
    FyMax: Integer;
    FMass: Integer;
  public
    constructor create( xMin, xMax, yMin, yMax, Mass: Integer);
    property xMin: Integer read FxMin;
    property yMin: Integer read FyMin;
    property xMax: Integer read FxMax;
    property yMax: Integer read FyMax;
    property Mass: Integer read FMass;
  end;
  { TMammoBoundaries }
  TBlobList = specialize TFPGObjectList<TBlob>;

I'm using {$mode objfpc} and unit fgl. Any hint?.
 
Leonardo M. Ramé
http://leonardorame.blogspot.com