Description of problem:
after dnf upgrade, I got a hint

For more information run:
    sudo tracer -iat 1447063032.6356657

so I've done that, but it crashed after entering "1" to see what it has to tell me about the first one ...

Version-Release number of selected component:
tracer-0.6.6-1.fc23

Additional info:
reporter:       libreport-2.6.3
cmdline:        /usr/bin/python /usr/bin/tracer -iat 1447063032.6356657
executable:     /usr/bin/tracer
kernel:         4.2.5-300.fc23.x86_64
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
default.py:112:render_interactive:UnicodeEncodeError: 'ascii' codec can't encode character u'\xe1' in position 12: ordinal not in range(128)

Traceback (most recent call last):
  File "/usr/bin/tracer", line 34, in <module>
    tracer.main.run()
  File "/usr/lib/python2.7/site-packages/tracer/main.py", line 42, in run
    return router.dispatch()
  File "/usr/lib/python2.7/site-packages/tracer/resources/router.py", line 59, in dispatch
    controller.render_interactive()
  File "/usr/lib/python2.7/site-packages/tracer/controllers/default.py", line 112, in render_interactive
    input("\n-- " + _("Press <enter> to get list of applications") + " --")
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe1' in position 12: ordinal not in range(128)

Local variables in innermost frame:
answer: '1'
filtered: [<Application: abrt-applet>, <Application: akonadi_agent_launcher>, <Application: akonadi_archivemail_agent>, <Application: akonadi_baloo_indexer>, <Application: akonadi_birthdays_resource>, <Application: akonadi_followupreminder_agent>, <Application: akonadi_maildispatcher_agent>, <Application: akonadi_mailfilter_agent>, <Application: akonadi_migration_agent>, <Application: akonadi_newmailnotifier_agent>, <Application: akonadi_notes_agent>, <Application: akonadi_sendlater_agent>, <Application: akonadiserver>, <Application: kaccess>, <Application: kactivitymanagerd>, <Application: kdeconnectd>, <Application: kded4>, <Application: kded5>, <Application: kdeinit4>, <Application: kdeinit5>, <Application: kglobalaccel5>, <Application: kio_http>, <Application: kio_http_cache_cleaner>, <Application: klauncher>, <Application: kmix>, <Application: knotify4>, <Application: konqueror>, <Application: konsole>, <Application: konversation>, <Application: korgac>, <Application: krunner>, <Application: kscreen_backend_launcher>, <Application: ksmserver>, <Application: kuiserver5>, <Application: kwalletd>, <Application: kwalletd5>, <Application: mc>, <Application: mplayer>, <Application: plasmashell>, <Application: plugin-container>, <Application: polkit-kde-authentication-agent-1>, <Application: pulseaudio>, <Application: seamonkey>, <Application: seapplet>, <Application: ssh>, <Application: trojita>, <Application: xpra>]
helper_controller: <tracer.controllers.helper.HelperController object at 0x7f588650da90>
self: <tracer.controllers.default.DefaultController object at 0x7f5889dd2d10>
view: <tracer.views.interactive.InteractiveView object at 0x7f588650dad0>