On Wed, 20 Oct 2010, Birger Jansen wrote:
Hi Michael,
Yes, TSub.Count should be used. I agree that it is dirty and confusing. Best
would be to only have it work in Delphi mode.
Hi,
Can you please enter a bug-report for this, and simply mention these facts ?
- Fix as suggested in Delphi mode
- Prohibit in ObjFPC mode ?
So it won't be forgotten.
Michael.
Kind regards,
Birger
-----Oorspronkelijk bericht-----
Van: Michael Van Canneyt <[email protected]>
Verzonden: wo 20-10-2010 13:22
Aan: FPC developers' list <[email protected]>;
Onderwerp: Re: [fpc-devel] Fatal: Internal error 200111022
Hello,
Which 'Count' should the compiler select ? I suspect TSub.Count ?
I think we should prohibit this dubious construct in ObjFC mode.
(but try to be delphi compatible in Delphi mode)
Michael.
On Wed, 20 Oct 2010, Birger Jansen wrote:
I'm not sure if this is the correct way to report this, please correct me if
I should report in another way.
I found an old conversation between Leonardo and Florian about the Fatail
internal error 200111022. The thread concluded that they could not reproduce
the error.
I got this error while converting a large project from Delphi to FPC. It
turns out that a base class has a property Count, and a derived class has a
function with the same name Count. This will compile, untill you call the
property or function Count.
I created an example that should explain it. Uncomment the marked line to get
the fatal internal error:
program project1;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}{$IFDEF UseCThreads}
cthreads,
{$ENDIF}{$ENDIF}
Classes;
type
TBase = class
private
function GetCount: Integer;
public
property Count: Integer read GetCount;
end;
TSub = class(TBase)
public
function Count: Integer; overload;
end;
function TSub.Count: Integer;
begin
Result := 0;
end;
{ TBase }
function TBase.GetCount: Integer;
begin
Result := 0;
end;
var
MySub: TSub;
i : Integer;
begin
MySub := TSub.Create;
// uncomment the next line for Fatal Internal error 200111022:
// for i := 0 to MySub.Count do begin end;
end.
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