[tbb-bugs] #28195 [Applications/Tor Browser]: TB fails to restart updating 8.5a3

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#28195: TB fails to restart updating 8.5a3
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 Reporter:  traumschule               |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tbb-regression            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by traumschule):

 8.0.2 -> 8.0.3 works but it takes 30s until the bar appears, looks like
 fixing this introduced an error.
 > Oct 25 10:03:33.000 [notice] Catching signal TERM, exiting cleanly.
 > JavaScript error: chrome://torbutton/content/tor-circuit-display.js,
 line 436: TypeError: myController is null
 > Fontconfig warning: "/home/tbb/tor-browser_en-
 US8.0.2/Browser/TorBrowser/Data/fontconfig/fonts.conf", line 85: unknown
 element "blank"
 > 1540461904853   addons.webextension.<unknown>   WARN    Loading
 extension 'null': Reading manifest: Error processing
 background.persistent: Event pages are not currently supported. This will
 run as a persistent background page.
 > 1540461905523   addons.xpi      WARN    Please specify whether you want
 browser_style or not in your options_ui options.
 > 1540461906559   addons.xpi      WARN    Please specify whether you want
 browser_style or not in your options_ui options.
 > Fontconfig warning: "/home/tbb/tor-browser_en-
 US8.0.2/Browser/TorBrowser/Data/fontconfig/fonts.conf", line 85: unknown
 element "blank"
 > Oct 25 10:05:09.477 [notice] Tor 0.3.4.8 (git-da95b91355248ad8) running
 on Linux with Libevent 2.1.8-stable, OpenSSL 1.0.2p, Zlib 1.2.11, Liblzma
 N/A, and Libzstd N/A.
 Do you need more info? (happy to test more:) Filed #28198 for the
 Fontconfig lines.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28195#comment:4>
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