In the breakpoint do a step into (f7) and ser the exact line that crashes Luiz Em 22/06/2015 14:03, "Bo Berglund" <[email protected]> escreveu:
> On Mon, 22 Jun 2015 13:29:07 -0300, luiz americo pereira camara > <[email protected]> wrote: > > >In my experince sigsegv occurs mostly when a field or variable is accessed > >before initialization. > > > >Try to set a breakpoint in dongle.initkey call. And evaluate the dongle > >field (open debugger evaluate window) > > > >Look for dongle or one of the tsentinel fields being nil > > > > I have already a breakpoint in the on-click event handler for the > button. The code is: > > procedure TfrmMain.btnFindKeyClick(Sender: TObject); > var > SerialNo: word; > begin > //Code to check for the dongle and if found display its contents > Dongle.InitKey; <-- Breakpoint here > Dongle.AppNumber := 1; > if Dongle.CheckKey then > begin > SerialNo := Dongle.SerialNo; > stxSerialNo.Caption := IntToStr(SerialNo); > end; > end; > > When Lazarus stops and I hover over the Dongle variable (which was > created in the form's OnCreate event) I see all fields of the Dongle > object and they seem to be normal, except for the FSentinelPacket. > > This is supposed to be an array of char [1..1028] but it says > FSENTINELPACKET=#0#0#0#0Truncated 1027->1000#### > > Does this imply that the size of the packet has been initialized > erroneously? > It is defined thus: ARRAY [1..1028] OF CHAR; > Can the indexing be a problem? The packet is defined with a starting > index of 1 rather than 0... > > > -- > Bo Berglund > Developer in Sweden > > > -- > _______________________________________________ > Lazarus mailing list > [email protected] > http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus >
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