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


From: Eli Zaretskii
Subject: bug#29066: 26.0.90; crash in gc involving buffer local symbols
Date: Tue, 31 Oct 2017 23:08:58 +0200

> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: vgatien-baron@janestreet.com,  29066@debbugs.gnu.org,  
> mshinwell@janestreet.com
> Date: Tue, 31 Oct 2017 22:03:26 +0100
> 
> >> 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.
> 
> Since GC is special, it needs to do special things.

But the crash due to double-free did happen as part of GC doing those
"special things".  So we are talking about those special things, not
something else.





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