error?

Spartacus · Post by **Spartacus** » Fri Dec 05, 2003 2:15 am

whenever i close my window it crashes and im running on winxp

i found that it crashes at this point
within the file of IUnknown.h

bool drop()
{
--ReferenceCounter; // <-- this line specifcially
if (!ReferenceCounter)
{
delete this;
return true;
}

return false;
}
im not sure why :/ but it would be nice if it could be fixed

November235 · Post by **November235** » Fri Dec 05, 2003 8:29 am

I thought you weren't allowed to drop() things derived from IUnknown. I'm not sure about that, but I think that's the problem.

Spartacus · Post by **Spartacus** » Fri Dec 05, 2003 7:56 pm

Ok, I will try and find out what the problem is then, maybe I am dropping somthing I shouldn't be :/

FleshCrawler · Post by **FleshCrawler** » Fri Dec 05, 2003 9:58 pm

is this when you are using the ESC-key to close your application?

Isometric God · Post by **Isometric God** » Sat Dec 06, 2003 8:52 am

It seems to be that "this" is NULL in this case. I have never heard that subtracting a value from an int. could cause a crash. What you did is probably Window->drop(); and with m_Window being NULL you call
drop() on an non-existing instance thus causing the crash.

I assume the window has been dropped before and is now NULL. You could test Window for NULL and find out. You could call any member function now and the result ( = crash ) would be the same... hope that helps