[tbb-bugs] #24415 [Applications/Tor Browser]: Unhandled exception at 0x6850687D (d2d1.dll) in firefox.exe (was: Tor crashes when opening new tab, reason unknown)

Tor Bug Tracker & Wiki blackhole at torproject.org
Thu Dec 21 16:36:27 UTC 2017

#24415: Unhandled exception at 0x6850687D (d2d1.dll) in firefox.exe
 Reporter:  kouwei32                  |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tbb-crash                 |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:

Comment (by cypherpunks):

 Replying to [ticket:24415 kouwei32]:
 > Tor stops working when opening new tab. I don't know why, but I have the
 debug report from Visual Studio: Unhandled exception at 0x6850687D
 (d2d1.dll) in firefox.exe: 0xC0000005: Access violation writing location
 Tor is not a browser. Firefox tries to detect graphics features when
 opening new tab. Unfortunately, it activates "hardware acceleration" for
 it even when it's disabled. So, the only question here is whether Firefox
 handles this exception by design (but tbb doesn't support seh) or it's a
 bug in your setup.
 > The first tab is still completely usable, and other features are
 accessible too.
 > Version is the latest at the time of ticket creation but number is
 unknown because unable to open settings.
 So, actually, "Tor" doesn't crash, right? (only one thread crashed)

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24415#comment:7>
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