[Ktechlab-devel] [SVN/r410] Adding logic components calls pure virtual method

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On 06/07/09 21:42, P Zoltan wrote:
> On Sun, 05 Jul 2009 22:51:01 +0200, Link<link at penguindevelopment.org>
> wrote:
>
>> On 05/07/09 17:04, P Zoltan wrote:
>>>     Does this still happen, in rev. 412 ?
>>>
>>>     Tried to reproduce this problem, but after placing practically all
>>> components on the circuit, only got a crash due failed assertion, in
>>> ElementSet.cpp, line 117.
>>>
>
>> It still happens in rev 415, and I've managed to find the problem: I had
>> my logic symbols set to rectangular. When that happens, the method
>> MultiInputGate::updateSymbolText()
>> (electronics/components/multiinputgate.cpp, line 88) calls the method
>> m_bInvertedOutput(), which doesn't appear to be defined.
>>
>> Using distinctive shapes for logic symbols works. :)
>>
>
>    Should be fixed in rev.418.
>
>    The problem was that a virtual function has been called from inside of
> the constructor. This way probably the virtual function table has not been
> populated yet, so the result was a call to a pure virtual function.
>
>    Please test it.
>
>     Zoltan
>
>
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OK, the rectangular logic shapes work. KTL now crashes because of a 
segfault in math/matrix.h (line 80) though. This happens when adding a 
fixed voltage source.