Skype snap crashes Xwayland

[Mohsen Hariri]

The Skype snap segfaults GNOME Shell on Wayland, crashing the session and sending the user back to the login screen.

```
$ snap info skype
name: skype
summary: One Skype for all your devices. New features. New look. All Skype.
publisher: Skype✓
contact: https://www.skype.com/
license: unset
description: |
  Skype keeps the world talking. Say “hello” with an instant message, voice or video call – all for
  free, no matter what device they use Skype on. Skype is available on phones, tablets, PCs, Macs
  and Linux.

  • Video calls – Don’t just hear the cheers, see it! Get together with 1 or 24 of your friends and
  family on a video call. Watch your everyone’s smiles and cries when you tell them “We’re
  engaged!!!"

  • Chat – Reach people instantly. Send messages to your friends, liven up conversations with
  emoticons and Mojis, or create a group chat to make weekend plans with up to 300 people.

  • Share – Do more together. Easily share your screen, photos, videos, documents, and files with
  your family and friends. Unlike email, Skype will transfer up to 300MB per file.

  • Voice calls – Camera shy? Make voice calls to anyone on Skype. You can also call mobile and
  landlines at low rates.
commands:
  - skype
snap-id: QRDEfjn4WJYnm0FzDKwqqRZZI77awQEV
tracking: insider/stable
refresh-date: today at 12:56 CEST
channels:
  stable: 8.28.0.41 (51) 148MB classic
  candidate: ↑
  beta: ↑
  edge: ↑
  insider/stable: 8.29.76.16 (52) 148MB classic
  insider/candidate: ↑
  insider/beta: ↑
  insider/edge: ↑
installed: 8.29.76.16 (52) 148MB classic

```

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xwayland 2:1.19.6-1ubuntu4
ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
Uname: Linux 4.15.0-32-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gpus.0000.01.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:01:00.0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 390.48 Thu Mar 22 00:42:57 PDT 2018
 GCC version: gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)
.tmp.unity_support_test.0:

ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: GNOME
Date: Fri Aug 31 12:58:26 2018
DistUpgraded: 2018-05-14 22:56:54,009 DEBUG icon theme changed, re-reading
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 390.48, 4.15.0-32-generic, x86_64: installed
 nvidia, 390.48, 4.15.0-33-generic, x86_64: installed
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] HD Graphics 530 [1025:105b]
 NVIDIA Corporation GM204M [GeForce GTX 980M] [10de:13d7] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] GM204M [GeForce GTX 980M] [1025:105b]
InstallationDate: Installed on 2017-04-10 (507 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Beta amd64 (20170321)
Lsusb:
 Bus 002 Device 046: ID 0bda:0316 Realtek Semiconductor Corp.
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 1bcf:2c81 Sunplus Innovation Technology Inc.
 Bus 001 Device 002: ID 0cf3:e300 Atheros Communications, Inc.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Acer Predator G9-791
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.15.0-32-generic root=UUID=30803519-0e69-413b-baaa-2adab2ea4c1e ro rootflags=subvol=@ nouveau.modeset=0 intel_iommu=on nouveau.runpm=0 i915.modeset=1 nvidia_drm.modeset=1
SourcePackage: xorg-server
UpgradeStatus: Upgraded to bionic on 2018-05-14 (108 days ago)
dmi.bios.date: 11/12/2015
dmi.bios.vendor: Acer
dmi.bios.version: V1.06
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Challenger_SLS
dmi.board.vendor: Acer
dmi.board.version: V1.06
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAcer:bvrV1.06:bd11/12/2015:svnAcer:pnPredatorG9-791:pvrV1.06:rvnAcer:rnChallenger_SLS:rvrV1.06:cvnAcer:ct10:cvrChassisVersion:
dmi.product.family: SKL
dmi.product.name: Predator G9-791
dmi.product.version: V1.06
dmi.sys.vendor: Acer
nvidia-settings:
 ERROR: Unable to find display on any available system

 ERROR: Unable to find display on any available system
version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[Mohsen Hariri (m-hariri)]

Here is the crash details sent using `ubuntu-bug /var/crash/_usr_bin_Xwayland.1000.crash`:
https://errors.ubuntu.com/oops/b0e17c6c-ad10-11e8-9949-fa163e6cac46

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1754693, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.