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

[Norman V. <nh...@ca...>]

Norman Vine wrote:
>
>Sam Stickland writes:
>>
>>Try:
>>
>>cvs update -P -D "26 Sep 2000"
>>
>>in src/pui, and try again.  Let us know the results.
>
>Bingo !!
>
>OK we know where to look :-)

After further inquiry and some trusty printf's

void puButton::doHit ( int button, int updown, int, int )
{
  cout << "puButton::doHit:" << endl;
  if ( puActiveWidget() && ( this != puActiveWidget() ) )
  {
    cout << "puActiveWidget()->getDownCallback() "  <<
                  puActiveWidget()->getDownCallback() << endl ;
    puActiveWidget() -> invokeDownCallback () ;
    cout << "calling puDeactivateWidget() "  << endl ;
    puDeactivateWidget () ;
  }
  ........
}

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


I do not believe that Tuxkart ever sets a DownCallback
hence 
  puActiveWidget()->getDownCallback()  should return 0

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

Hope this helps

Norman