[tbb-bugs] #28133 [Applications/Tor Browser]: Tor Browser crashes/restarts when using Reader View shortcut (ctrl+alt+r)

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#28133: Tor Browser crashes/restarts when using Reader View shortcut (ctrl+alt+r)
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 Reporter:  ev9F8itL                  |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  Low                       |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Minor                     |     Resolution:
 Keywords:  ff60-esr, tbb-crash       |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by ev9F8itL):

 I installed Tor Browser by downloading and extracting the .tar.xz file. I
 run start-tor-browser from the folder.

 I tried downloading a fresh package from the website and still have the
 issue. Here's the output of ./start-tor-browser --debug

 {{{
 Launching './Browser/start-tor-browser --detach --debug'...
 Oct 22 23:15:54.012 [notice] Tor 0.3.4.8 (git-da95b91355248ad8) running on
 Linux with Libevent 2.1.8-stable, OpenSSL 1.0.2p, Zlib 1.2.8, Liblzma N/A,
 and Libzstd N/A.
 Oct 22 23:15:54.012 [notice] Tor can't help you if you use it wrong! Learn
 how to be safe at https://www.torproject.org/download/download#warning
 Oct 22 23:15:54.012 [notice] Read configuration file
 "/home/user0/Applications/tor-browser_en-US/Browser/Downloads/tor-
 browser_en-US/Browser/TorBrowser/Data/Tor/torrc-defaults".
 Oct 22 23:15:54.012 [notice] Read configuration file
 "/home/user0/Applications/tor-browser_en-US/Browser/Downloads/tor-
 browser_en-US/Browser/TorBrowser/Data/Tor/torrc".
 Oct 22 23:15:54.018 [notice] Scheduler type KIST has been enabled.
 Oct 22 23:15:54.018 [notice] Opening Socks listener on 127.0.0.1:9150
 Oct 22 23:15:54.018 [notice] Opening Control listener on 127.0.0.1:9151
 Oct 22 23:15:54.000 [notice] Parsing GEOIP IPv4 file
 /home/user0/Applications/tor-browser_en-US/Browser/Downloads/tor-
 browser_en-US/Browser/TorBrowser/Data/Tor/geoip.
 Oct 22 23:15:54.000 [notice] Parsing GEOIP IPv6 file
 /home/user0/Applications/tor-browser_en-US/Browser/Downloads/tor-
 browser_en-US/Browser/TorBrowser/Data/Tor/geoip6.
 Oct 22 23:15:54.000 [notice] Bootstrapped 0%: Starting
 Oct 22 23:15:55.000 [notice] Starting with guard context "default"
 Oct 22 23:15:55.000 [notice] Bootstrapped 80%: Connecting to the Tor
 network
 Oct 22 23:15:55.000 [notice] New control connection opened from 127.0.0.1.
 Oct 22 23:15:55.000 [notice] New control connection opened from 127.0.0.1.
 Oct 22 23:15:55.000 [notice] Bootstrapped 85%: Finishing handshake with
 first hop
 1540250155151   addons.webextension.https-everywhere-eff at eff.org
 WARN    Please specify whether you want browser_style or not in your
 browser_action options.
 1540250155151   addons.webextension.{73a6fe31-595d-460b-a920-fcc0f8843232}
 WARN    Please specify whether you want browser_style or not in your
 browser_action options.
 Oct 22 23:15:55.000 [notice] Bootstrapped 90%: Establishing a Tor circuit
 Oct 22 23:15:55.000 [notice] Tor has successfully opened a circuit. Looks
 like client functionality is working.
 Oct 22 23:15:55.000 [notice] Bootstrapped 100%: Done
 Oct 22 23:15:57.000 [notice] New control connection opened from 127.0.0.1.
 Oct 22 23:15:57.000 [notice] New control connection opened from 127.0.0.1.
 Oct 22 23:16:03.000 [notice] Owning controller connection has closed --
 exiting now.
 Oct 22 23:16:03.000 [notice] Catching signal TERM, exiting cleanly.
 JavaScript error: chrome://torbutton/content/tor-circuit-display.js, line
 436: TypeError: myController is null
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28133#comment:2>
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