The Delphi Bug List

Entry No.
640

VCL - Win32 - ComCtrls - THeaderControl
Each instance of THeaderControl leaks memory

1.02	2.01	3.0	3.01	3.02	4.0	4.01	4.02	4.03	5.0	5.01	6.0	6.01	6.02	Kylix 1.0
N/A	Absent	Absent	Absent	Absent	Absent	Absent	Absent	Absent	Exists	Exists	Fixed	Fixed	Fixed	N/A

Description

Reported by Colin Wilson; checked by Jordan Russell

There's a memory leak in THeaderControl that shows up with MemorySleuth, etc.

It happens any time you use the THeaderControl (Win32) component.

In the THeaderControl constructor there's a line...

  FImageChangeLink := TChangeLink.Create;

But the FImageChangeLink is never 'Free'd - in the destructor or anywhere else.

Note from checker:
The amount of memory leaked appears to be 16 bytes.

User-contributed comments

BigBro
30 Aug 2001 01:26 AM GMT

From http://www.automatedqa.com/support/leaksd5.asp

File: comctrls.pas
Procedure: THeaderControl.Destroy
After a call to THeaderControl.Create, the THeaderControl class forgets to free the FImageChangeLink object.

Workaround
destructor THeaderControl.Destroy;
begin
  FCanvas.Free;
  FSections.Free;

  //Add following line
  FImageChangeLink.Free;

  if Assigned(FSectionStream) then FSectionStream.Free;
  inherited Destroy;
end;

cygnum al'kaizen
08 Aug 2006 09:19 AM GMT

i added the line to freeup FChangeImageList in the destructor of this object, but the leak still persists. any more ideas?

Latest update of this entry: 2001-06-19

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