From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 105334 invoked by alias); 16 Dec 2019 02:41:21 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 105293 invoked by uid 89); 16 Dec 2019 02:41:16 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.4 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS autolearn=ham version=3.3.1 spammy=partnership, exercising, accord X-HELO: smtp-out6.electric.net Received: from smtp-out6.electric.net (HELO smtp-out6.electric.net) (192.162.217.193) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 16 Dec 2019 02:41:13 +0000 Received: from 1iggJp-0008l5-V6 by out6b.electric.net with emc1-ok (Exim 4.92.3) (envelope-from ) id 1iggJq-0008lP-TG for cygwin@cygwin.com; Sun, 15 Dec 2019 18:41:10 -0800 Received: by emcmailer; Sun, 15 Dec 2019 18:41:10 -0800 Received: from [148.79.164.52] (helo=exchsmtp.stfc.ac.uk) by out6b.electric.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-SHA384:256) (Exim 4.92.3) (envelope-from ) id 1iggJp-0008l5-V6 for cygwin@cygwin.com; Sun, 15 Dec 2019 18:41:09 -0800 Received: from [192.168.0.14] (86.0.81.86) by exch02.fed.cclrc.ac.uk (148.79.164.52) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.1.1779.2; Mon, 16 Dec 2019 02:41:09 +0000 Subject: Re: assertion "p >= path" failed To: References: <13b61476-6c41-1697-817e-652a695d3520@cornell.edu> <5b60cc71-fa1b-b972-10be-b37ff5756fab@rl.ac.uk> <46bc0b2e-a138-3e25-a403-4f3d6eff1651@rl.ac.uk> From: Tim Adye Message-ID: <6e379f2f-7316-44dd-b68e-ba4b2a23f6f4@rl.ac.uk> Date: Mon, 16 Dec 2019 08:35:00 -0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 8bit X-EsetResult: clean, is OK X-EsetId: 37303A293CED2F69627D65 X-Outbound-IP: 148.79.164.52 X-Env-From: tim.adye@stfc.ac.uk X-Proto: esmtps X-Revdns: mail.dl.ac.uk X-TLS: TLSv1.2:ECDHE-RSA-AES256-SHA384:256 X-Authenticated_ID: X-PolicySMART: 3590380 X-IsSubscribed: yes X-SW-Source: 2019-12/txt/msg00123.txt.bz2 Hi Ken, On 11/12/2019 16:03, Ken Brown wrote: > On 11/4/2019 7:49 AM, Tim Adye wrote: >> Hi Ken, >> >> On 31/10/2019 18:19, Ken Brown wrote: >>> [Please don't top-post on this list.  Thanks.] >>> >>> On 10/30/2019 7:56 PM, Tim Adye wrote: >>>> I'm afraid I get a very similar error with 3.1.0-0.7: >>>> >>>> assertion "p >= path" failed: file >>>> "/home/kbrown/src/cygpackages/cygwin/cygwin-3.1.0-0.7.x86_64/src/newlib-cygwin/winsup/cygwin/path.cc", >>>> >>>> line 2906, function: int symlink_info::check(char*, const suffix_info*, >>>> fs_info&, path_conv_handle&) >>> OK, so your issue is different from the one that was fixed. >>> >>>> Again following resume from hibernation after going offline with the offline >>>> files as HOME (H:\). >>> I'm not familiar with offline files, so it would help if you would explain this >>> in complete detail. >> Offline Files is a feature of Sync Center that makes network files available to >> a user, even if the network connection to the server is unavailable. Windows >> keeps a copy of files stored on the network on the local computer. This allows >> users to work with them even when they are not connected to the network or a >> server is unavailable. The next time the user connects to the network or the >> server is available, their offline files on your computer will automatically >> sync to the network files on the server. >> >> I have it set up to keep a local copy of a mapped network drive that holds my >> files (Cygwin $HOME). As I understand it (eg. explained in >> https://docs.microsoft.com/en-us/windows-server/storage/folder-redirection/folder-redirection-rup-overview), >> when the system goes offline, Windows uses the "Folder Redirection" feature to >> redirect access to the client-side cache, C:\Windows\CSC. >> >> I guess Cygwin can choke on this redirected path. >>> It would also help if you could capture the assertion failure in a debugger.  Do >>> you know how to use gdb?  If so, I would suggest attaching gdb to bash before >>> hibernating, and putting a breakpoint at symlink_info::check.  Assuming that gdb >>> is still usable after you resume from hibernation, we ought to be able to find >>> the cause of the assertion failure. >> I will try this, but it will be tricky, because I don't get the assertion every >> time I go offline / hibernate. I'll see if I can work out how to provoke the bug >> reliably. I don't remember the situation from every time it's happened, but I >> think perhaps it can happen if there is a bash window open at the time. bash >> still works, but it can't run anything else, nor can I start any new processes. >> If so, your test might be possible, but might not see the symptom, since the >> problem seems to be in processes started by bash. But I'll try. > Hi Tim, > > I don't know if you noticed the thread starting here: > > https://cygwin.com/ml/cygwin/2019-12/msg00016.html > > The problem reported there has been fixed, and I hope that the fix also works > for your problem. You can test it by installing the latest snapshot from > https://cygwin.com/snapshots/. Hi Ken, Many thanks for the interesting and encouraging pointer. That does look similar to my issue, though I think the other issue was (originally at least) something to do with inaccessible mounts, rather than cached mounts. I have tested the new snapshot and don't see any problems so far. However I have been having trouble reproducing my original issue, especially since I recreated my offline-files synchronisation partnership, so I can't tell for sure whether the update fixes my particular problem, or it just went away of its own accord. I'll keep exercising it and let you know if I see any more the assertion crash. Thanks, Tim. -- 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