X2Go Bug report logs - #760
Segfault of QDialog in a PyQt application

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From: owner@bugs.x2go.org (X2Go Bug Tracking System)
Subject: Bug#757 closed by X2Go Release Manager X2Go Release Manager
 <git-admin@x2go.org> (X2Go issue (in src:nx-libs) has been marked as
 closed)
Message-ID: <handler.757.c.151012562121280.notifdone@bugs.x2go.org>
References: <20171108071935.ABAE65DACF@ymir.das-netzwerkteam.de>
X-X2go-PR-Keywords: pending
X-X2go-PR-Message: they-closed 757
X-X2go-PR-Package: nx-libs
Date: Wed, 08 Nov 2017 07:25:06 +0000
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This is an automatic notification regarding your Bug report
which was filed against the nx-libs package:

#757: Segfault of QDialog in a PyQt application

It has been closed by X2Go Release Manager X2Go Release Manager <git-admin@x2go.org>.

Their explanation is attached below along with your original report.
If this explanation is unsatisfactory and you have not received a
better one in a separate message then please contact X2Go Release Manager X2Go Release Manager <git-admin@x2go.org> by
replying to this email.


-- 
X2Go Bug Tracking System
Contact owner@bugs.x2go.org with problems

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From: X2Go Release Manager X2Go Release Manager <git-admin@x2go.org>

To: 757-submitter@bugs.x2go.org

Cc: control@bugs.x2go.org, 757@bugs.x2go.org

Subject: X2Go issue (in src:nx-libs) has been marked as closed

Date: Wed, 8 Nov 2017 08:19:35 +0100 (CET)

close #757
thanks

Hello,

we are very hopeful that X2Go issue #757 reported by you
has been resolved in the new release (2:3.5.0.33) of the
X2Go source project »src:nx-libs«.

You can view the complete changelog entry of src:nx-libs (2:3.5.0.33)
below, and you can use the following link to view all the code changes
between this and the last release of src:nx-libs.

    http://code.x2go.org/gitweb?p=nx-libs.git;a=commitdiff;h=0629b95e1853d166bd468d0e53cb29c460cfb08f;hp=023bc5a6217fb0cdd9c98a81c106abc8438c0b6c

If you feel that the issue has not been resolved satisfyingly, feel
free to reopen this bug report or submit a follow-up report with
further observations described based on the new released version
of src:nx-libs.

Thanks a lot for contributing to X2Go!!!

light+love
X2Go Git Admin (on behalf of the sender of this mail)

---
X2Go Component: src:nx-libs
Version: 2:3.5.0.33-0x2go1
Status: RELEASE
Date: Wed, 08 Nov 2017 08:07:54 +0100
Fixes: 757 758 760 1160
Changes:
 nx-libs (2:3.5.0.33-0x2go1) RELEASED; urgency=low
 .
   [ Mihai Moldovan ]
   * debian/control:
     - Add xkb-data to nxagent's Recommends.
     - Uploaders: add myself. Also, force a rebuild due to the changed
       versioning.
     - Add Breaks statement on pre-4.1.0.0 x2goserver to x2goagent package.
     - Change Breaks statement to pre-4.0.1.21 x2goserver and add a Replaces:
       x2goserver << 4.0.1.21 section to x2goagent package. We'll do the
       /etc/x2go/x2goagent.options file move for x2goserver 4.0.1.21 and
       nx-libs 3.5.0.33 already.
   * nx-libs.spec:
     - Add xkeyboard-config to nxagent's Requires. Should be a weak dependency,
       but RPM doesn't support that too well yet.
     - Copy new debian/x2goagent.options file into build environment, analogous
       to what debian/roll-tarballs.sh does.
     - Add new x2goagent.options file to installed file list of x2goagent
       package.
     - Let x2goagent package satisfy x2goagent-virtual.
     - Add -mno-vxs to general C(XX)FLAGS on ppc64le.
       Hopefully just a temporary workaround until
       https://bugzilla.redhat.com/show_bug.cgi?id=1489712 /
       https://bugs.centos.org/view.php?id=13779 are resolved.
       Backported from Arctica GH 3.6.x branch.
       v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
     - Drop ugly sed hack to push optflags to build system.
     - Pass CDEBUGSFLAGS and friends directly to the make command in %build.
     - Let x2goagent conflict with pre-4.0.1.21 x2goserver versions. Needed for
       x2goagent.options file move.
   * debian/:
     - Add x2goagent.options file for compatibility with x2goserver nightly.
   * debian/roll-tarballs.sh:
     - Copy new debian/x2goagent.options file into real tarball environment.
   * debian/Makefile.nx-libs:
     - Install/destroot new x2goagent.options file.
   * debian/rules:
     - Symlink and remove new debian/x2goagent.options file into/from build
       environment.
   * debian/x2goagent.install:
     - Add new x2goagent.options file.
   * Refresh:
     - 0016_nx-X11_install-location.debian.patch
     - 9900-dxpc-license-history.full+lite.patch
   * nx-X11: use the "old", non-NX header location.
     Affects:
     - 1270_nx-X11_CVE-2017-2624-Use-timingsafe_memcmp-to-c.full.patch
   * {debian/control,nx-libs.spec}:
     - Add proper dependencies upon xkbcomp for RPM and DEB packages.
       Fixes: #1160.
       Backported from Arctica GH 3.6.x branch.
       v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
   * debian/patches:
     - Refresh all patches. Removes some fuzziness and adds the -p diff option
       to show the C function name in hunk headers.
     - Fixup series file to include previous patch.
   * nxcomp: Handle launchd sockets in DISPLAY variable correctly when fetching
     X cookie.
     Backported from Arctica GH 3.6.x branch.
     v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
     Adds:
       - debian/patches/1600_nxcomp-handle-launchd-socket-in-Auth.full+lite.patch
   * nxcomp: Hardcode X11 and (legacy/xfs) font UNIX paths.
     Fixes: ArcticaProject/nx-libs#536
     Allowing overrides via NX_TEMP and TEMP breaks system using
     pam_tmpdir.so and most server infrastructure expects the location to be
     fixed anyway.
     Backported from Arctica GH 3.6.x branch.
     v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
     Adds:
       - debian/patches/1610_nxcomp-harcode-some-UNIX-socket-path.full+lite.patch
 .
   [ Mike Gabriel ]
   * debian/libxinerama1.postinst.in:
     + Revert 5a9f829. Make sure libnx-Xinerama1 based Xinerama works
       again with X2Go on Debian based systems.
     + Enforce symlink creation for Xinerama et al. library symlinks.
       (Fixes: #757, #758, #760).
   * Xinerama symlinking: Attach Xinerama symlinking to nxagent bin:package (and
     not libnx-xinerama1).
     Backported from Arctica GH 3.6.x branch.
   * debian/Makefile.nx-libs:
     + Make sure that 'make all' only calls 'make build' and _not_ the global
       '%:' ruleset afterwards.
       Backported from Arctica GH 3.6.x branch.
       v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
   * buildsystem:
     - OPTFLAGS: Properly propagate build option flags to nxcomp{,ext,shad} and
       the nx-X11 build scripts.
       Backported from Arctica GH 3.6.x branch.
       v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
       Adds:
       - debian/patches/1500_all_propagate-optflags-to-subcompone.full+lite.patch
 .
   [ Ulrich Sibiller ]
   * nx-X11: Backport CVE-2017-2624 (timingsafe_memcmp)
     Backported from Arctica GH 3.6.x branch.
     v2: backport to nx-libs 3.6.x (Ulrich Sibiller)
     v3: backport to nx-libs 3.5.0.x (Mihai Moldovan)
     Adds:
     - 1270_nx-X11_CVE-2017-2624-Use-timingsafe_memcmp-to-c.full.patch
 .
   [ Oleksandr Shneyder ]
   * nxcomp: Set TokenSize to 1536 for link type ADSL and WAN.
     Improving non-xrender based browser scrolling behaviour when link type is
     set to ADSL or WAN.
     Backported from Arctica GH 3.6.x branch.
     v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
     Adds:
     - debian/patches/1300_nxcomp_Set-TokenSize-to-1536-for-lin.full+lite.patch
   * nx-X11: Render.c: Improve situation for multiple trapezoid requests.
     Backported from Arctica GH 3.6.x branch.
     v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
     Adds:
     - debian/patches/1400_nx-X11_Render.c-Improve-situation-fo.full+lite.patch
 .
   [ Simon Matter ]
   * nxcomp: Reduce control->TokenSize slightly again in order to fix
     fragmentation of packages when on VPN (or otherwise encapsulated)
     connections.
     Backported from Arctica GH 3.6.x branch.
     v2: backport to nx-libs 3.5.0.x (Mihai Moldovan)
     Adds:
     - debian/patches/1301_nxcomp_Reduce-TokenSize-slightly-for.full+lite.patch

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From: PAILLAT Olivier SOPRA GROUP <olivier.paillat@cea.fr>

To: "'submit@bugs.x2go.org'" <submit@bugs.x2go.org>

Subject: RE: Segfault of QDialog in a PyQt application

Date: Thu, 22 Jan 2015 10:07:26 +0000

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Package: client
Version: 4.0.3.0
Qt 4.8.6

When we run our PyQt application on our Debian Wheezy computer with an ssh -X connection it work fine
But when we use X2Go to access the computer and we run our application we've got a segmentation fault at the first QDialog opening. (when we run QDialog.exec_).
We recently update the X2Go version and before that update it was working fine.
We found at least one post that describe the same problem in January 2014 on your bug report site :
X2Go Bug report logs - #410
Segfault of _X11TransWritev in libNX_X11.so.6 with libQtGui

Like suggested in this report  if we run a simple application to test an opening of a dialog box it work fine with X2Go

From your experience of this bugs is there any way to solve this problem ?

Sincerely,


Olivier PAILLAT
Agence STIE Sud-Est

[Sopra Steria]

Sopra Steria
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olivier.paillat@cea.fr<mailto:olivier.paillat@cea.fr> - www.soprasteria.com<http://www.soprasteria.com>

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