[dolphin] [Bug 477298] New: Dolphin hangs when navigating to a directory with any JSON files in it

[Ilya Bizyaev]

https://bugs.kde.org/show_bug.cgi?id=477298

            Bug ID: 477298
           Summary: Dolphin hangs when navigating to a directory with any
                    JSON files in it
    Classification: Applications
           Product: dolphin
           Version: 23.08.3
          Platform: openSUSE
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: bizyaev at zoho.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
For me, this started today after an update. Dolphin displays a blank view for
the folder and then gets stuck indefinitely until being killed by the user.

STEPS TO REPRODUCE
1. mkdir tmp
2. touch tmp/test2.json
3. Navigate to ./tmp

OBSERVED RESULT
Dolphin hangs

EXPECTED RESULT
Dolphin opens the folder

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20231117
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.112.0
Qt Version: 5.15.11
Kernel Version: 6.6.1-1-default (64-bit)
Graphics Platform: Wayland
Graphics Processor: Mesa Intel® UHD Graphics

ADDITIONAL INFORMATION

I suspect that Dolphin hangs somewhere in thumbnail generation or metadata
extraction code, as even hovering a JSON file path in the terminal panel is
enough to trigger the bug. However, I have "Text document" thumbnails disabled,
and even disabling thumbnails completely doesn't make the problem disappear.

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