Can somebody confirm this in 10.3?

[Erix A. 8]

Could somebody confirm this, before I report the error?

Here's the full code (simple form with a button on it).

When I add break point at the end of procedure TForm1.Button1Click(Sender: TObject);, in Delphi 10.2.3 I see the item, which was added, while in 10.3 I only see a pointer to it.

unit Unit1;

interface

uses
  System.Generics.Collections,
  Winapi.Windows,
  Winapi.Messages,
  System.SysUtils,
  System.Variants,
  System.Classes,
  Vcl.Graphics,
  Vcl.Controls,
  Vcl.Forms,
  Vcl.Dialogs,
  Vcl.StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

type
  TItem = class
  private
    Ff2: string;
    Ff1: string;
    procedure Setf1(const Value: string);
    procedure Setf2(const Value: string);
  public
    property f1: string read Ff1 write Setf1;
    property f2: string read Ff2 write Setf2;
  end;

type
  TItemList = class(TObjectList<TItem>);

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  item: TItem;
  list: TItemList;
begin
  item := TItem.Create;
  item.f1 := 'f1';
  item.f2 := 'f2';
  list := TItemList.Create;
  list.Add(item);
end;

{ TItem }

procedure TItem.Setf1(const Value: string);
begin
  Ff1 := Value;
end;

procedure TItem.Setf2(const Value: string);
begin
  Ff2 := Value;
end;

end.

 

10.3

 

10.2

Edited November 25, 2018 by Erix A.

[Dalija Prasnikar 1338]

This is due to inner TList structural changes.  FItems were moved from TList<T> into ListHelper class and its type has been changed into a pointer. 

 

AFAIK this issue (limited debugging) has been reported, but report is not yet publicly available

[Uwe Raabe 1877]

Looks like that is as designed. FItems in TListHelper has been a Pointer even in 10.2, but in 10.2 the TList holds FItems as array of T, while 10.3 doesn't have this anymore.

[Erix A. 8]

OK, thanks.  Reported the bug anyway.

[Stefan Glienke 1901]

On 11/25/2018 at 10:43 AM, Dalija Prasnikar said:

AFAIK this issue (limited debugging) has been reported

Yup, did that.

 

To work around that issue, you can put list.List into the watches.

Edited November 26, 2018 by Stefan Glienke

[Erix A. 8]

I'm wondering if they are working on this? Just had to remove all 10.3 new features from my project (e.g. declaring variables in the middle of the code) so that I could debug my app in 10.2.