Xorg crash with slack when receiving too many emojis

[Julien]

The following has been reported to slack via their (private) ticketing system.

Using slack ("deb https://packagecloud.io/slacktechnologies/slack/debian/ jessie main") and with preferences set to "Message Display => Emoji Style => None: plain text only", a numerous quantity of emojis in a single message sent will crash the system and set you back to the session login screen.

This only happens with official "slack" package. "scudcloud" is not / does not seem affected.

Definition of "numerous": 399 ":rooster:" emojis sent in a single message is enough to crash the system.

To reproduce: install slack via apt above, get someone to punk you with a single line of as many emojis as possible.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8.1
ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-generic 3.19.8-ckt12
Uname: Linux 3.19.0-49-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Jun 3 17:53:06 2016
InstallationDate: Installed on 2015-11-02 (214 days ago)
InstallationMedia: Xubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: No upgrade log present (probably fresh install)

[Julien (jlecomte)]

Contents of Slack ticket sent to the slack team:

http://pastebin.com/2iVDasGB

[penalvch (penalvch)]

Julien, thank you for reporting this and helping make Ubuntu better.

Could you please run the following command once from a terminal by ensuring you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information:
apport-collect -p xorg 1588899

When reporting xorg related bugs in the future, please do so via the above method. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]