DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 54MFjS9d237715 Authentication-Results: delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com Authentication-Results: delorie.com; spf=pass smtp.mailfrom=cygwin.com DKIM-Filter: OpenDKIM Filter v2.11.0 delorie.com 54MFjS9d237715 Authentication-Results: delorie.com; dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=Pe5lffc9 X-Recipient: archive-cygwin AT delorie DOT com DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 604E03857B9E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com; s=default; t=1747928726; bh=gfu93+uHXPCrC3A3At47vyk5h/GM4pd3IjOVlqZPZ1c=; h=Subject:In-Reply-To:Date:Cc:References:To:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=Pe5lffc9prxOary4ztul/mwGhgsjeAqZaM3xFuKVQ5pdTZACl4v5WFd1h4tUr3jsu g3mc+Er1bAeZAUMr4puTT1HJ4pfbshZmrwlt8DxarwqE+cW52NxNLp2LtU5ftWSkPK +WP036p7VKpAdQNhARFjkOyGNR5jS9Uz7tRT5b1s= X-Original-To: cygwin AT cygwin DOT com Delivered-To: cygwin AT cygwin DOT com DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CB96B3857C6E ARC-Filter: OpenARC Filter v1.0.0 sourceware.org CB96B3857C6E ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1747928695; cv=none; b=owN8beF8VSMwWuUlWrQrNXFZ8rxqntNdtNicZEqLnDrkHcZHlaTMhRufgYxn3++SNMF/ZGzlLy/1NLnM8tmBZ+T5SCPsJQac4LC5kVwA6BcOTfBfNiYhn01/7Mh8euZtQ0iHitPwT1Ke7pWsxiPIaFb5oc9f/uSIy1kMwHjAc0o= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1747928695; c=relaxed/simple; bh=PufDuZ+igyeye/Aouj/vS7G7GZb/mscOVRpu+Mn6Cio=; h=DKIM-Signature:Mime-Version:Subject:From:Date:Message-Id:To; b=K6cMB7GEoHfIbYQB7Xrx9Fvi5KsovhFCcB5jBRDIDTFzuHM1DcFe5bHa6sSn3uZM4cIprCVTYHV3z2Hiph0WnNGfhdEWdJhV5jTvv9fPmnMHVAQAT5PGajxb3gSWk9d0YN1hjxDJWc3zqGS276x88k9MSe0sHOv9ve0ZfUBY3gk= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CB96B3857C6E Mime-Version: 1.0 (Mac OS X Mail 16.0 $3776.700.51.11.2$) Subject: Re: bash::SIGSEGV in timegm () from D:\cygwin64\bin\cygwin1.dll In-Reply-To: Date: Thu, 22 May 2025 16:44:42 +0100 Cc: cygwin AT cygwin DOT com Message-Id: References:

To: Jon Turney X-Mailer: Apple Mail (2.3776.700.51.11.2) X-Proofpoint-ORIG-GUID: 1O3NpjE3dpSdj4MJWjWd9lN6SnWF-j01 X-Proofpoint-GUID: 1O3NpjE3dpSdj4MJWjWd9lN6SnWF-j01 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-22_07,2025-05-22_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 phishscore=0 bulkscore=0 clxscore=1011 spamscore=0 mlxlogscore=999 suspectscore=0 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.22.0-2503310001 definitions=main-2505220160 X-BeenThere: cygwin AT cygwin DOT com X-Mailman-Version: 2.1.30 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Gary Liddle via Cygwin Reply-To: Gary Liddle Content-Type: text/plain; charset="utf-8" Errors-To: cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com Sender: "Cygwin" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by delorie.com id 54MFjS9d237715 > On 22 May 2025, at 14:30, Jon Turney wrote: > > On 22/05/2025 14:15, Gary Liddle via Cygwin wrote: >> Yesterday I updated Cygwin using setup-x86_64 to the latest non test release, and bash —login would no longer start. >> It turns out bash won’t start for me when a .profile runs a sub-command. >> This is highlighted by:- >> gdb bash >> dll cygwin1.dll >> b timegm >> run >> bash-5.2$ echo foo >> foo >> bash-5.2$ a=`echo foo` >> Program received signal SIGSEGV, Segmentation fault. >> 0x00007ffa5cb3ce31 in timegm () from D:\cygwin64\bin\cygwin1.dll >> (gdb) >> ... >> bash-5.2$ a=`xxx` >> bash: xxx: command not found >> >> Program received signal SIGSEGV, Segmentation fault. >> 0x00007ffa5cb3ce31 in timegm () from D:\cygwin64\bin\cygwin1.dll >> (gdb) >> uname -a CYGWIN_NT-10.0-26100 garyl 3.7.0-0.98.gb39b510c1ce6.x86_64 2025-05-18 15:52 UTC x86_64 Cygwin > [...] > > Thanks for reporting this. > > >> I am at a loss as to how to dig further because gdb doesn’t seem to want to go near timegm and I can’t see anything in the strace output that seems to point to anything useful. > > The information in [1] may be helpful in investigating further with gdb. > > [1] https://cygwin.com/faq.html#faq.programming.debugging-cygwin > Thanks for the link, but all the .dbg programmes segfault in:- ie bash.exe.dbg mainCRTStartup () at /usr/src/debug/cygwin-3.4.10-1/winsup/cygwin/crt0.c:16 for all versions (which might be a clue?). , but the "set cygwin-exceptions on” produces a bit more. gdb bash Reading symbols from /usr/lib/debug//usr/bin/bash.exe.dbg... (gdb) set cygwin-exceptions on (gdb) run Starting program: /usr/bin/bash bash-5.2$ a=`ls` Thread 1 "bash" received signal SIGSEGV, Segmentation fault. sigdelayed () at sigfe.s:124 124 movl %ebx,0x24(%rsp) (gdb) (gdb) where #0 sigdelayed () at sigfe.s:124 #1 0x000000010042db0b in wait_for (pid=, flags=) at /usr/src/debug/bash-5.2.21-1/jobs.c:3208 Backtrace stopped: Cannot access memory at address 0xfffffffdffffbef8 … Which looks very not helpful. Regards Gary -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple