bug#29066: 26.0.90; crash in gc involving buffer local symbols

[Eli Zaretskii]

> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: vgatien-baron@janestreet.com,  29066@debbugs.gnu.org,  
> mshinwell@janestreet.com
> Date: Tue, 31 Oct 2017 21:23:09 +0100
> 
> On Okt 31 2017, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> > It isn't freed, it's on the symbol_free_list.
> 
> A symbol on the symbol_free_list is a freed symbol, not available for
> use.

I guess you are saying that sweep_symbols has a bug?  Because it hits
this "freed" symbol every GC, AFAICT.