[Solved] Another collectgarbage question. (Inherited class)

Nigel Atkinson sent me an e-mail regarding this issue. It worked, so I am
attaching it here for those who experience a similar problem. Thanks!
-------------------------------------------------------------------------------------------------
I hit the same situation.  As it turns out when you make an instance of a
Lua class, that has a base class, it makes a global called 'super'.  This
was for the old method of calling the base constructor.  I think you will
find it is only the *last* instance (that fits the above description)
created that is affected.

So doing:

super = nil

before collecting garbage, it should work.  I personally commented out the
C++ code that makes the 'super' global, as its use is now depreciated.

Hope this helps!

--

Nigel Atkinson
[email protected]


On Wed, Sep 23, 2009 at 5:38 PM, Taesoo Kwon <[email protected]> wrote:

> Hello,
>
> I am using luabind 0.8.1, lua5.1.4, MSVC2005.
> I have an example where garbage collection doesn't work for a derived lua
> class.
> Is this a normal behavior? What should I modify?
>
> class 'VVV'
>
> function VVV:__init()
>    print("ctor VVV")
> end
>
> function VVV:__finalize()
>    print("dtor VVV")
> end
>
>
> class 'GCtest'
>
> function GCtest:__init()
>    self.skel=VVV()
> end
>
> class 'GCtest2'(GCtest) -- derived class
> function GCtest2:__init()
>    GCtest.__init(self)
> end
>
> function gctest()
>    do
>       local test=GCtest()
>    end
>    collectgarbage() -- dtor of VVV is called.
>    collectgarbage()
>    collectgarbage()
>
>    do
>       local test=GCtest2()  -- <<< <  add "super=nil" after here. Then dtor
> of VVV is called.
>
   end
>    collectgarbage()
>    collectgarbage()
>    collectgarbage() -- dtor of VVV is not called.
>
> end
>
> Thank you.
>

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