[okular] [Bug 510260] New: Okular freezes and can not be killed when drive with opened PDF is unmounted

[Igor]

https://bugs.kde.org/show_bug.cgi?id=510260

            Bug ID: 510260
           Summary: Okular freezes and can not be killed when drive with
                    opened PDF is unmounted
    Classification: Applications
           Product: okular
      Version First 25.08.1
       Reported In:
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: stojkovic.igor at gmail.com
  Target Milestone: ---

SUMMARY
Okular freezes and can not be killed when drive with opened PDF is unmounted. I
am not 100% sure it is the unmount operation because the operation was done by
PCloud client as mentioned bellow in reproduction steps.

STEPS TO REPRODUCE
1. Install PCloud drive client app from the official site and have it create
its folder in your home dir.
2. Place a PDF in that folder, preferably bigger one so Okular can't keep it
whole in memory in case it does that.
3. Open that PDF in Okular
4. Exit the PCloud client app (in my case PCloud app was turned off because it
notified me that it has an update and I clicked that I want it to update and
restart).

It is possible it could also be reproduced by just unmounting the drive the
opened PDF is on but I haven't tried that.

OBSERVED RESULT
Okular freezes at this point or after you try to scroll to another end of the
document and even kill -9 won't kill it.

EXPECTED RESULT
Okular should notify me that the document is no longer available and turn off.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
Kernel Version: 6.16.10-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × Intel® Core™ i7-8700K CPU @ 3.70GHz
Memory: 16 GiB of RAM (15.5 GiB usable)
Graphics Processor: NVIDIA GeForce GTX 1080 Ti

ADDITIONAL INFORMATION

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