[Lazarus] External: SIGSEGV

[cc_ at freemail.hu]

Thanks to All of You who have tried to help!.



I have located the problem and found a solution, but was not able to 
reproduce it yet in a separate test app.





The structure of the code looked like this:



MyObj = class;

private

   Obj1: TOtherObj;

   Obj2: TOtherObj;

. . .

end;



procedure T_Main.Button1Click(Sender: TObject);

begin

   with Obj1 do begin

       SomeProcedure(Obj2);

   end;

end;



The exception occurred while reading "Obj2";



The problem completely disappeared after removing the "with ..." block, 
which was actually unnecessary junk code since no Obj1 property or method 
was used in that block.





I am not sure, but Obj1 and Ojb2 being of the same type, and Obj1 not being 
used may have had something to do with it. Just guessing. :)



I will try to make a bug report, when I will be able to reproduce the bug.



Thanks for your help again!



   - Leslie -





----- Original Message ----- 
From: "Boguslaw Brandys" <brandys at o2.pl>
To: "General mailing list" <lazarus at lazarus.freepascal.org>
Sent: Tuesday, May 27, 2008 9:15 PM
Subject: Re: [Lazarus] External: SIGSEGV


> Michael Van Canneyt wrote:
>>
>> On Tue, 27 May 2008, Jon Foster wrote:
>>
>>> SIGSEGV (otherwise known as a segfault) is a *nix signal indicating that 
>>> the an illegal address was
>>> accessed. Normally it can't be caught with a try...except. You have to 
>>> muck about with signals to catch it
>>> with try ... except.
>>
>> This is not correct.
>> The RTL catches this signal and converts this to an exception, if you use 
>> the sysutils unit.
>>
>> Michael.
>> _______________________________________________
>> Lazarus mailing list
>> Lazarus at lazarus.freepascal.org
>> http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
>>
>
> My advice: test program outside of the Lazarus IDE.If it crashes then
> it's not an IDE, but I suspect it's all about gdb.
>
>
> Regards
> Boguslaw
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