[okular] [Bug 396087] Okular stops rendering some pages, locks up at 25% CPU usage and won't die

[Alexander Kandaurov]

https://bugs.kde.org/show_bug.cgi?id=396087

Alexander Kandaurov <aakandaurov at yandex.ru> changed:

           What    |Removed                     |Added
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                 CC|                            |aakandaurov at yandex.ru

--- Comment #7 from Alexander Kandaurov <aakandaurov at yandex.ru> ---
I investigated this a bit and it looks like what causes the hang is the
QTimer::singleShot() call from Generator::generatePixmap() which keeps an
endless cycle of firing and resetting the same timer. I also experienced a hang
once on closing a document (the window has closed but the process remained
eating 25% of CPU) where it got stuck in
DocumentPrivate::clearAndWaitForRequests() on loop.exec() call where it also
kept firing that generatePixmap() timer.

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