Re: [Plib-devel] PUI crash in Tuxkart.

[Steve B. <sjb...@ai...>]

Norman Vine wrote:

> with the preceding code when clicking on the menubar
> in Tuxkart I get ...
> 
>    puMouse: button 0 updown 0
>    puOneShot::doHit:
>    puButton::doHit:
>    puActiveWidget()->getDownCallback() 1
> @#% CRASH
> notice that "calling puDeactivateWidget()" is never printed

That's pretty much where it dies for me too - although GDB
catches it just on the call to puButton::doHit.

Someone else said they see subtly different symptoms - and
yet someone else said they could also reproduce it with
Tux_AQFH....for me, Tux_AQFH seems to run correctly.

So this is a somewhat random event.
 
> I do not believe that Tuxkart ever sets a DownCallback
> hence
>   puActiveWidget()->getDownCallback()  should return 0

Right. The menu bar should (internally) register a callback
that causes the menu to drop-down when the button is clicked.
 
> obviously calling what ever lives at
> address 1 is bound to cause problems !!
> 
> The activeWidget is getting stomped on or at least
> it's DownCallback() is being set to a non NULL value
> but I do not know by whom yet  --  Plib or Tuxkart

From what I could tell, pretty much all the fields of the
puOneShot were being corrupted...this may be a symptom
rather than a cause...however, separate UP and DOWN
callbacks are relatively new and should be suspected
here.

-- 
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