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UPDATE 25MAR18 SOLVED

I am experiencing a different segmentation fault with gns3-gui than the one described previously. I am using version 2.1.4.

2018-03-24 16:01:26 INFO root:126 Log level: INFO
2018-03-24 16:01:26 INFO main:258 GNS3 GUI version 2.1.4
2018-03-24 16:01:26 INFO main:259 Copyright (c) 2007-2018 GNS3 Technologies Inc.
2018-03-24 16:01:26 INFO main:261 Application started with /opt/anaconda/bin/gns3
Fatal Python error: Segmentation fault

Current thread 0x00007faf8bc64740 (most recent call first):
  File "/opt/anaconda/lib/python3.6/site-packages/gns3/utils/analytics.py", line 121 in sendScreenView
  File "/opt/anaconda/lib/python3.6/site-packages/gns3/qt/__init__.py", line 212 in __init__
  File "/opt/anaconda/lib/python3.6/site-packages/gns3/main_window.py", line 81 in __init__
  File "/opt/anaconda/lib/python3.6/site-packages/gns3/main.py", line 278 in main
  File "/opt/anaconda/bin/gns3", line 11 in <module>
[1]    17059 segmentation fault (core dumped)  gns3

***SOLVED after a pacman -Syu and conda update anaconda all is well.

@denvit, all ok on my side, remove the old tarball and retry, 2.1.4 has been re-released with a new sha256sum...

I get a checksum validation error for gns3-gui-2.1.4.tar.gz :

==> Validating source files with sha256sums...
    gns3-gui-2.1.4.tar.gz ... FAILED
    gns3.desktop ... Passed
==> ERROR: One or more files did not pass the validity check!

Version 2.1.0 seems to cause segmentation faults with unknown reason, log[1].

According to the github issue[2], a workaround is to stop logging qt message by commenting out /usr/lib/python3.6/site-packages/gns3/qt/__init__.py line 298 which is log.info(msg_string). The filename and line number are inferred from the log[1].

[1] https://gist.github.com/anonymous/b556f0fcf13b4083676c904649713742

[2] https://github.com/GNS3/gns3-server/issues/1225

May I suggest wireshark-qt instead of wireshark-gtk? (The latter has been at risk of deprecation since 2013, and use of gns3-gui implies use of qt already.)

Also, why optional instead of required as it appears to be in gns3's official Ubuntu ppa?

Thanks @hcartiaux for the update. I really appreciate it.

I'm open to co-maintainership... Any help is welcome.

I'm blocked on the gns3-server update because it requires outdated python modules, and I don't want to break any working user installation by updating only gns3-gui...

Can somebody take over this package?

The PKGBUILD for gns3-gui is easy to update, but gns3-server requires specific outdated version of python modules which must be packaged specifically.

If you want the updated GUI PKGBUILD, here it is:

pkgname=gns3-gui
pkgver=2.0.0
pkgrel=1
pkgdesc='GNS3 network simulator. Graphical user interface package.'
arch=('any')
url='https://github.com/GNS3/gns3-gui'
license=('GPL3')
groups=('gns3')
makedepends=('python-setuptools')
depends=('python-jsonschema' 'gns3-converter' 'python-raven' 'python-psutil' 'python-pyqt5' 'qt5-svg')
optdepends=('gns3-server: GNS3 backend. Manages emulators such as Dynamips, VirtualBox or Qemu/KVM.'
'dynamips: Cisco router emulator.'
'xterm: Default terminal emulator for CLI management of virtual instances.'
'wireshark-gtk: Live packet capture.')
source=("${pkgname}-${pkgver}.tar.gz::https://github.com/GNS3/${pkgname}/archive/v${pkgver}.tar.gz"
'gns3.desktop')
md5sums=('f7f72460edf457acb68c866ca130108f'
'ac6ba60be0a1cb7fc965d1a105e431d5')

package() {
cd ${srcdir}/${pkgname}-${pkgver}
python setup.py install --root=${pkgdir} --optimize=1
install -Dm644 ${srcdir}/gns3.desktop ${pkgdir}/usr/share/applications/gns3.desktop
install -Dm644 ${srcdir}/${pkgname}-${pkgver}/resources/images/gns3_icon_256x256.png ${pkgdir}/usr/share/pixmaps/gns3.png
install -Dm644 ${srcdir}/${pkgname}-${pkgver}/LICENSE ${pkgdir}/usr/share/licenses/${pkgname}/LICENSE
}

Hi. Any progress on this?