[okular] [Bug 498729] New: Okular hangs / freezes (infinite loop?) when changing PDF dropdown form input

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=498729

            Bug ID: 498729
           Summary: Okular hangs / freezes (infinite loop?) when changing
                    PDF dropdown form input
    Classification: Applications
           Product: okular
           Version: 24.12.1
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: dorla.hutch at gmail.com
  Target Milestone: ---

Created attachment 177398
  --> https://bugs.kde.org/attachment.cgi?id=177398&action=edit
I tried to remove meta data and identifying information from the PDF.

SUMMARY

I have a personal information form (PDF) where interacting with one specific
dropdown form input freezes Okular at 24% CPU usage (fortunately only that)
without any further reaction.

STEPS TO REPRODUCE
1. open the attached PDF page
2. enable Form interaction (top right corner)
3. choose a new value for the first dropdown (combo) box "Beschäftigt als:"

OBSERVED RESULT

It will not change the value. Instead, it hangs indefinitely.

EXPECTED RESULT

Changes the value to the chosen value but at least remains serviceable without
restarting the process.

SOFTWARE/OS VERSIONS
Windows: 11
Linux/KDE Plasma: 6.12.9
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.1

ADDITIONAL INFORMATION

Bug does not appear in Firefox but also happens on Windows with Okular.

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