Re: iscleared problem in lgc.c

[Mark Hamburg <mark@...>]

One corollary to this is that if you want to create weak sets of  
values, you should use:

	set[ value ] = value

to add the value to the set rather than

	set[ value ] = true

That way doing pairs( set ) won't reveal finalized keys.

(I got bitten by this years ago writing the weak observer mechanism in  
Lightroom.)

Mark