Error using HeapTrace

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garlar27:
I've made an application which has a Thread that reads bar codes from a serial scanner. This thread generates keypress events with a Synchronize.

It works without problems, so I wanted to test whether it has a memory leak or not. On the first run I opened the port, started the thread, then I stopped the thread (without reading a bar code) and terminate it. Then I quit the program with no memory leak.

At the second one I scanned a bar code but this time it has risen this exception while synchronizing:

--- Quote ---Marked memory at $01BA2778 invalid
Wrong signature $1061D179 instead of 9E7D8017
$08075845
$08077EF3
$0809161B TSCANNER__ONRECV, line 1011 of scanner.pas
$080901BF TRECVTHREAD__DOONRECV, line 642 of scanner.pas
$080B4D7C
$081C95D4 THREADSYNC_IOCALLBACK, line 637 of /usr/lib/lazarus/0.9.28.2/lcl/interfaces/gtk/gtkwidgetset.inc
$0017FDAB
$00148E88
$0014C730

--- End quote ---

the line 1011 is a call to a procedure we call SendKeyPress(Key: word); which uses (on Linux)

--- Code: Pascal [+][-]window.onload = function(){var x1 = document.getElementById("main_content_section"); if (x1) { var x = document.getElementsByClassName("geshi");for (var i = 0; i < x.length; i++) { x[i].style.maxHeight='none'; x[i].style.height = Math.min(x[i].clientHeight+15,306)+'px'; x[i].style.resize = "vertical";}};} ---function XSendEvent(para1:PDisplay; para2:TWindow; para3:TBool; para4:clong; para5:PXEvent):TStatus;cdecl;external libX11;
to generate the event.

The question is:
Is there a problem with heaptrace and threads and/or OS calls?

I'm using Lazarus v0.9.28.2-0 beta on Ubuntu 9.10

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