[okular] [Bug 393478] crash when I exit presentation mode and enter again

[Tobias Deiminger]

https://bugs.kde.org/show_bug.cgi?id=393478

Tobias Deiminger <haxtibal at posteo.de> changed:

           What    |Removed                     |Added
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                 CC|                            |haxtibal at posteo.de

--- Comment #11 from Tobias Deiminger <haxtibal at posteo.de> ---
I can reproduce the bug and will have a look into it. Someone closed libpulses
eventfd(2), while libpulse continues to write to it. A write to the already
closed fd in pa_fdsem_post then triggers assertion. I modified pulseaudio to
get a bit more debug info:

$ strace -e close ./okular 2>&1 
[...]
close(19)                               = 0
close(15)                               = 0     # who is doing that? and why?
close(15)                               = 0
close(15)                               = 0
close(19)                               = 0
close(21)                               = 0
[...]
Invalid write to eventfd: fd=15, r=-1, errno=9  # pa_fdsem_post tried writing
fd 15, too late, already closed

I think next thing to check is where the close happened. Could be okular, Qt,
or pulseaudio itself.

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