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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: buffer.c/buffer.h:  How to add new buffer-local variables?
Date: Thu, 04 Apr 2019 22:29:43 +0300
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To: Keith David Bershatsky <esq@lawlist.com>
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In-reply-to: <m2bm1l61kx.wl%esq@lawlist.com> (message from Keith David
	Bershatsky on Thu, 04 Apr 2019 11:57:02 -0700)
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> Date:  Thu, 04 Apr 2019 11:57:02 -0700
> From:  Keith David Bershatsky <esq@lawlist.com>
> Cc:  emacs-devel@gnu.org,Stefan Monnier <monnier@iro.umontreal.ca>,Andreas Schwab <schwab@linux-m68k.org>,Alan Mackenzie <acm@muc.de>,Daniel Colascione <dancol@dancol.org>
> 
> Increasing the eassert value in field_relpos, and increasing the value of MAX_PER_BUFFER_VARS, are sufficient to build and use Emacs for the NS and X11 ports.
> 
> The w32 port of Emacs, however, crashes when adding one too many local-variables in buffer.c/h that breaks the camel's back:
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x01189584 in vector_marked_p (v=0xbaadf008) at alloc.c:3980
                                 ^^^^^^^^^^^^
This 0xbaadf008 is a clear sign of using uninitialized memory.