[okular] [Bug 437774] New: Document sometimes reloads after saving annotations

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https://bugs.kde.org/show_bug.cgi?id=437774

            Bug ID: 437774
           Summary: Document sometimes reloads after saving annotations
           Product: okular
           Version: 21.04.1
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: pbs3141 at googlemail.com
  Target Milestone: ---

SUMMARY

When I modify and save the annotations in a PDF document, usually Okular does
not reload the file, which is the correct behaviour. The bug is that sometimes,
it does. This happens very rarely, and non-deterministically.

Once it has happened, it cannot be made to happen again by undoing and redoing
the annotations, suggesting it's due to some timing problem or race condition.

STEPS TO REPRODUCE

1. Open a document, then starting making changes to the annotations and saving
them, navigating around in between.
2. Wait a long time for it to happen.

OBSERVED RESULT

Eventually the document reloads.

EXPECTED RESULT

The document should never reload.

SOFTWARE/OS VERSIONS

KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.82.0
Qt Version: 5.15.2
Graphics Platform: X11

ADDITIONAL INFORMATION

I've been experiencing this bug in all versions of Okular since about a year
ago, and for all I know it may have existed before then.

I'm sorry the steps to reproduce above aren't of much use. If you have any
better suggestions, like patching Okular to record why it's reloading the file
and what's going on, I'd be happy to follow them.

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