[okular] [Bug 415261] Okular crash when trying to open certain djvu file

[Tobias Deiminger]

https://bugs.kde.org/show_bug.cgi?id=415261

--- Comment #7 from Tobias Deiminger <haxtibal at posteo.de> ---
The new backtrace again shows a seemingly impossible call stack
(DjVuGenerator::generateDocumentInfo should not be reachable via
TOC::notifySetup).

This kind of error could happen if okular loads a binary incompatible version
of the DjVu generator plugin okularGenerator_djvu.so. It seems at least
possible, because
- Debian distributes okular and DjVu plugin in two different packages okular
and okular-extra-backends
- bullseye is testing, something might have gone wrong during dist upgrade,
leaving both packages out of sync
- generator API core/generator.h occasionally changed in a binary incompatible
way

Can you check if both packages show same version? For me it's

$ dpkg -s okular | grep '^Version:'
Version: 4:17.12.2-2.2+b1
$ dpkg -s okular-extra-backends | grep '^Version:'
Version: 4:17.12.2-2.2+b1

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