GNU bug report logs - #30855
25.3; temacs fails with bus error during garbage collection

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Eli Zaretskii <eliz <at> gnu.org>, Andreas Schwab <schwab <at> suse.de>
Cc: ulm <at> gentoo.org, gentoo-bug <at> opensource.sf-tec.de, 30855 <at> debbugs.gnu.org
Subject: bug#30855: 25.3; temacs fails with bus error during garbage collection
Date: Tue, 20 Mar 2018 09:58:12 -0700

[Message part 1 (text/plain, inline)]

Even with the fix the code assumes that Lisp_Object is aligned at least 
as strictly as void *; this should be verified. Plus, if the alignments 
are the same Emacs can avoid a runtime check each time through the loop, 
which should help branch prediction. I installed the attached into 
master; if it fixes Ulrich's problem I think this should be backported 
to emacs-26. Thanks to Ulrich, Eli, and Andreas for reporting this and 
suggesting the fix.

[0001-Port-to-32-bit-sparc64.patch (text/x-patch, attachment)]

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