Running GUI app raises external: SIGSEGV

[jl]

Hi, i'm trying to figure out why i get this exception when i run a simple test GUI application, hope to receive some pointers.  Thanks.


unit Unit1;

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls, common;

type

  { TForm1 }

  TForm1 = class(TForm)
    mySMSSender: TWritePort;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.lfm}

{ TForm1 }

procedure TForm1.FormCreate(Sender: TObject);
begin

end;

procedure TForm1.Button1Click(Sender: TObject);
begin
    mySMSSender.sCFUN :='test'; <-- exception appears here!
end;

end.


unit common;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils;

type
TWritePort = class(TObject)
  private
    { Private declarations }

  protected
  public
    sCFUN:   string;
    constructor Create;
    destructor Destroy; override;
  end;

implementation

constructor TWritePort.Create;
begin
  inherited Create;
end;

destructor TWritePort.Destroy;
begin
  inherited;
end;

end.

[fabienwang]

what is that component TWritePort ?
it's not in the uses

you miss the:
mySMSSender := TWritePort.Create;

[Leledumbo]

Hi, i'm trying to figure out why i get this exception when i run a simple test GUI application, hope to receive some pointers.  Thanks.

I don't see anywhere you create TWritePort instance and assign it to mySMSSender. i.e. nothing like:

Code: [Select]

mySMSSender := TWritePort.Create;

what is that component TWritePort ?
it's not in the uses

He posts two source, one is the program (above) and the other is the unit named common (below).

[jl]

what is that component TWritePort ?
it's not in the uses

you miss the:
mySMSSender := TWritePort.Create;

Oh, i missed that, thanks for pointing out.   

[fabienwang]

Thanks Leledumbo ^^