Public bug reported:

With the most recent libubuntu-app-launch4:

$ apt policy libubuntu-app-launch4
libubuntu-app-launch4:
  Installed: 0.10+17.04.20170215.1-0ubuntu1
  Candidate: 0.10+17.04.20170215.1-0ubuntu1
  Version table:
 *** 0.10+17.04.20170215.1-0ubuntu1 400
        400 http://archive.ubuntu.com/ubuntu zesty-proposed/main amd64 Packages
        100 /var/lib/dpkg/status

Unity8 aborts on startup with:

> LTTng-UST: Error (-17) while registering tracepoint probe. Duplicate
registration of tracepoint probes having the same name is not allowed.

ProblemType: Crash
DistroRelease: Ubuntu 17.04
Package: unity8 8.15+17.04.20170301.2-0ubuntu1 [origin: 
LP-PPA-ci-train-ppa-service-2481]
ProcVersionSignature: Ubuntu 4.10.0-8.10-generic 4.10.0-rc8
Uname: Linux 4.10.0-8-generic x86_64
ApportVersion: 2.20.4-0ubuntu2
Architecture: amd64
Date: Thu Mar  2 09:51:45 2017
ExecutablePath: /usr/bin/unity8
ExecutableTimestamp: 1488389347
InstallationDate: Installed on 2016-05-06 (299 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcCmdline: /usr/bin/unity8 --mode=greeter
ProcCwd: /var/lib/lightdm
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/false
Signal: 6
SourcePackage: unity8
StacktraceTop:
 __lttng_events_init__ubuntu_app_launch () at 
/usr/include/lttng/ust-tracepoint-event.h:1011
 call_init (l=<optimized out>, argc=argc@entry=2, 
argv=argv@entry=0x7ffc9ad667a8, env=env@entry=0x5570b3998740) at dl-init.c:72
 call_init (env=0x5570b3998740, argv=0x7ffc9ad667a8, argc=2, l=<optimized out>) 
at dl-init.c:30
 _dl_init (main_map=main_map@entry=0x7f70500ad630, argc=2, argv=0x7ffc9ad667a8, 
env=0x5570b3998740) at dl-init.c:120
 dl_open_worker (a=a@entry=0x7f707cff76c0) at dl-open.c:575
Title: unity8 crashed with SIGABRT
UpgradeStatus: Upgraded to zesty on 2016-11-22 (99 days ago)
UserGroups:

** Affects: ubuntu-app-launch (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: unity8 (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: amd64 apport-crash need-amd64-retrace third-party-packages zesty

** Information type changed from Private to Public

** Also affects: ubuntu-app-launch (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: unity8 (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1669314

Title:
  unity8 crashed with SIGABRT: LTTng-UST: Error (-17) while registering
  tracepoint probe. Duplicate registration of tracepoint probes having
  the same name is not allowed.

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