GNU bug report logs - #29183
27.0.50; SIGSEGV on C-g on Windows

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Message #26 received at 29183 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: John Mastro <john.b.mastro <at> gmail.com>, Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 29183 <at> debbugs.gnu.org
Subject: Re: bug#29183: 27.0.50; SIGSEGV on C-g on Windows
Date: Wed, 08 Nov 2017 20:53:53 +0200

> From: John Mastro <john.b.mastro <at> gmail.com>
> Date: Wed, 8 Nov 2017 10:35:06 -0800
> Cc: 29183 <at> debbugs.gnu.org
> 
> Ah, thanks. After preprocessing, that line becomes:
> 
> static struct thread_state __attribute__ ((aligned (8))) main_thread;

That's what it should have become...

> >> $ gcc --version
> >> gcc.exe (Rev1, Built by MSYS2 project) 7.2.0
> >
> > Should be okay, I think.  Does the problem go away if you remove
> > GCALIGNED from that line in thread.c and rebuild?
> 
> Yep, the SIGSEGV is gone if I remove GCALIGNED from that line.

Hmm... so it sounds like our assumption that this attribute should be
a no-op in this case is incorrect, or maybe it's a bug in GCC 7.2?
Paul?

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