firefox crashed [@pthread_mutex_lock] [@??] -- libflashplayer.so

[Brushy]

... firefox crashed

... Firefox crashes randomly

I'm using Firefox 2.0.0.4 and it crashes without any apparent reason.
I tried running it through Terminal and after it crashed it gave me a message: "The application 'Gecko' lost its connection to the display :0.0;
most likely the X server was shut down or you killed/destroyed
the application." but I don't know what it means.

[Hilario J. Montoliu (hjmf) (hmontoliu)]

Thank you Brushy for submitting this report.

Could you please try to obtain a backtrace by following the instructions on
[1], or upload the crash report that probably was generated during the crash
and that should be located at /var/crash/ to [2].

Please indicate which extensions/plugins do you have enabled; and if this crash
is reproducible describe the steps that lead to it (it is very important for us
to have a test case for each crash).

This will greatly aid us in tracking down your problem.

Thanks in advance.

H. Montoliu

[1] https://wiki.ubuntu.com/MozillaTeam/Bugs
[2] https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/119099/+addcomment

[Brushy (a-ap-o)]

Plugins I'm using are flashplugin-nonfree and sun-java6-plugin.
And I don't know how to reproduce the crash on purpose, it seems to crash randomly.
I attached the crash report to this comment.

[Hilario J. Montoliu (hjmf) (hmontoliu)]

Retrace done.

Extract from retraced stacktrace:
...
#3 <signal handler called>
#4 pthread_mutex_lock () from /lib/tls/i686/cmov/libpthread.so.0
#5 ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#6 ?? () from /usr/lib/flashplugin-nonfree/libflashplayer.so
#7 start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8 clone () from /lib/tls/i686/cmov/libc.so.6
...
Tagging as mt-confirm mt-needtestcase for further processing

[Hilario J. Montoliu (hjmf) (hmontoliu)]

Retraced Thread Stacktrace

[Hilario J. Montoliu (hjmf) (hmontoliu)]

Thank you Brushy for your feedback.

The crash seems that was caused by adobe's flash plugin which we can do anything about it, since it is closed source. You might want to report it upstream directly.

However, it will be very useful to have a testcase so we can check if this bug gets fixed in future versions, so if you ever manage to reproduce it, please report it.

Thank you in advance.

[Brushy (a-ap-o)]

Okay, thanks for help :)
And what exactly should I do when Firefox crashes again? Repost the crash report?

[Hilario J. Montoliu (hjmf) (hmontoliu)]

> And what exactly should I do when Firefox crashes again? Repost the crash report?

Yes, open a *new* crash report, It might be the same incident or it might be not. But please, when reporting it, please indicate when possible, the steps to reproduce it.

Thank you Brushy in advance.

[Brushy (a-ap-o)]

Okay, here's the new crash report.

Firefox seemed to crash when Flash applet was active, I was browsing Screwattack.com and watching Flash-videos there when it crashed last time.

[Hilario J. Montoliu (hjmf) (hmontoliu)]

Thank you Brushy.

Asap I'll try to reproduce this crash.

*Note for triagers*: last report has the same backtrace than the former one.

[Brushy (a-ap-o)]

Here's the latest crash report, thought it could help.

[Dara Adib (daradib)]

Marking as duplicate of Bug 126040, because it has more subscribers and has become the center for discussion of this bug. Please look at the other bug report to see if there is any missing information that you can provide. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.