[Fresco-devel] kit destruction not informing the server?

I'm tracking down the problem where clicking the Print button twice 
causes the server to crash. The problem is that the server context 
thinks it has a pointer to a valid postscript drawing kit when it doesn't.

KitImpl::decrement calls ~KitImpl when it detects that its own usage 
count is zero. Unfortunately, nobody ever bothers to tell the server 
context about that, so it never removes it from 
ServerContextImpl::_kits. The only time it ever removes an entry from 
_kits is in its own destructor, which means that the server is being 
shut down.

I've heard that this lifecycle stuff can be complicated so I'm asking 
what the correct fix is. I see two options:

a) make the ServerContextImpl test that the kit is still valid before 
trying to make calls on it. (Not certain myself how to do that.)

b) make the KitImpl hold on to a ServerContext_var and add a function to 
the API that allows the Kit to inform the server context that the kit is 
now gone

Or is there supposed to be another mechanism that I simply failed to 
notice? I have a hard time believing that kit destruction never worked.

Nick Lewycky