[perl #109726] PL_sv_undef loses identity

On Thu Feb 09 06:13:44 2012, nicholas wrote:
> 0:   !AvREAL() && !AvREIFY() just the stacks? [and @DB::args
> currently]
> 1:   !AvREAL() && AvREIFY()  @_ [and @DB::args should be here]

@DB::args *does* have AvREIFY set.

> Anyway, I suspect that there's low risk of problems elsewhere if the
> Pads
> switched to using PL_sv_placeholder for a free slot, as they are only
> supposed to be accessed via our APIs, which would never actually
> *return*
> it. And Pads are already somewhat insane with their manual reference
> counting fakery.

Thread cloning would have to know about it, too, as @DB::args can end up
containing pads.


-- 

Father Chrysostomos


---
via perlbug:  queue: perl5 status: open
https://rt.perl.org:443/rt3/Ticket/Display.html?id=109726

• [perl #105906] Bleadperl d164302a breaks Lexical::Var under threads+mad by Father Chrysostomos via RT
• Re: [perl #109726] PL_sv_undef loses identity by Nicholas Clark
• [perl #109726] PL_sv_undef loses identity by Father Chrysostomos via RT
• Re: [perl #105906] Bleadperl d164302a breaks Lexical::Var underthreads+mad by Zefram
• [perl #105906] Bleadperl d164302a breaks Lexical::Var under threads+mad by Father Chrysostomos via RT
• Re: [perl #105906] Bleadperl d164302a breaks Lexical::Var underthreads+mad by Zefram