[perl #108280] @ISA self-loop

On Sun Jan 15 12:43:57 2012, sprout wrote:
> $ ./perl -Ilib -le '@ISA = "foo"; use Scalar::Util weaken;
> weaken($a=\@ISA); undef *ISA; print $a'
> ARRAY(0x826ba0)
> 
> @ISA has its own loop that prevents it from being freed.
> 
> It seems we need a way for the backreferences array to point to magic,
> not just SVs.

No, what we need is for the elements’ magic to have no reference count
on the array and for the array to have free magic that clears the magic
of its elements (for efficiency only if their refcount > 1).

-- 

Father Chrysostomos

• [perl #108280] @ISA self-loop by Father Chrysostomos via RT