X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:subject:from:to:references:message-id:date
	:mime-version:in-reply-to:content-type
	:content-transfer-encoding; q=dns; s=default; b=iojFjLJ3sKcUxlBE
	Hbstk2HW8ieoDDfVw2SorcTfABQQxzftTebCt9vjhfb8e9j7a2wjQ6MB7CUb00Y7
	H31l77JC01qcNEYG3sK8epW1WQDRD8W+FOJ2Sx5QThLZ5Ik6oxbylLjxU2SQSieE
	FQohrzzipyCB6b6OkBdOdypm1Yg=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:subject:from:to:references:message-id:date
	:mime-version:in-reply-to:content-type
	:content-transfer-encoding; s=default; bh=qIbrctJGjxmA/57WAuPNcs
	QHjbg=; b=M4uDFBxe3X5VhYgqoV54F5ctfXdJgK7yJQFX0MwWMaTyG84RCl/WhJ
	bzh8PUh8seCl0efvmw/loB0C0+Orx6wj2j6zBMRjtK2h3Sje8sdHfhOPI46BCT1y
	j89QH1ebXpDrYMZsvnZ37g5l96s5pC2DzJvVsksJkYKFyCL8Z/VPw=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=1.0 required=5.0 tests=BAYES_20,KAM_LAZY_DOMAIN_SECURITY,TIME_LIMIT_EXCEEDED autolearn=unavailable version=3.3.2 spammy=Centre, dept, Canada, canada
X-HELO:	cliff.scrc.umanitoba.ca
Subject:	Re: libharfbuzz0 1.7.6-1 update causing xwin-xdg-menu.exe to crash
From:	Gilles Detillieux <grdetil AT scrc DOT umanitoba DOT ca>
To:	cygwin AT cygwin DOT com
References:	<30aa068b-574f-8770-d8f3-eb037c038709 AT scrc DOT umanitoba DOT ca>
Message-ID:	<dd650fe0-46ab-99c4-8b0e-641f8f38350b@scrc.umanitoba.ca>
Date:	Tue, 24 Apr 2018 16:30:01 -0500
User-Agent:	Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0
MIME-Version:	1.0
In-Reply-To:	<30aa068b-574f-8770-d8f3-eb037c038709@scrc.umanitoba.ca>

I just ran into this bug on a third Windows 10 1709 64-bit system, only 
this time it was a little worse. Both xwin-xdg-menu.exe and xterm.exe 
would crash. An strace on xterm.exe showed the crash occurring after 
reading that same font, but it happened even when I reverted 
libharfbuzz0 to the 1.7.4-1 version. On this system, I also had to 
revert libfreetype6 from 2.8.1-1 to 2.6.5-1 to get xterm and 
xwin-xdg-menu to run reliably. Something in the font handling in these 
two libraries broke on a recent update.

On 04/19/2018 04:15 PM, Gilles Detillieux wrote:
> Has anybody else run into this problem? I've done two installations of 
> Cygwin/X on Windows 10 systems this week, and they both had problems 
> with the XWin Server dying just a few seconds after starting up. I 
> traced the problem back to xwin-xdg-menu.exe getting a Segmentation 
> fault, which then causes XWin Server to exit. I hacked an alternate 
> .startxwinrc file to prevent XWin Server from dying (it ends with a 
> "sleep infinity"), so I could debug it further.
>
> With the XWin Server running reliably, I then ran "strace 
> xwin-xdg-menu.exe" and saw that it got a segmentation fault just after 
> reading a TTF font from the Windows Font directory (bahnschrift.ttf if 
> it matters). I noticed there were two recent library updates related 
> to font handling, so I tried back out to the previous version for 
> each. It turns out that when I reverted to version 1.7.4-1 of 
> libharfbuzz0, xwin-xdg-menu.exe stopped crashing.
>
> If it matters, both these systems are the Fall Creator's Update (1709) 
> of Windows 10 64-bit, and I'm running the 32-bit version of Cygwin.
>
> Hopefully someone can track down and fix this recent bug!
>
> Thanks,
> Gilles
>

-- 
Gilles R. Detillieux              E-mail: <grdetil AT scrc DOT umanitoba DOT ca>
Spinal Cord Research Centre       WWW:    http://www.scrc.umanitoba.ca/
Dept. of Physiology and Pathophysiology, Rady Faculty of Health Sciences,
Univ. of Manitoba  Winnipeg, MB  R3E 0J9  (Canada)


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -