[dolphin] [Bug 425240] New: Doplhin freezes displaying a folder containing fifos

[jdvm]

https://bugs.kde.org/show_bug.cgi?id=425240

            Bug ID: 425240
           Summary: Doplhin freezes displaying a folder containing fifos
           Product: dolphin
           Version: 20.04.3
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: khin.nada at gmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 130804
  --> https://bugs.kde.org/attachment.cgi?id=130804&action=edit
After having pressed Close button in Dolphin's Title Bar.

SUMMARY

Browsing the data subfolder in ~/.zoom, Dolphin freezes after a second or less
and I can only interact with the app using Title Bar, having to close Dolphin.

As only a few files without extension were strange to me, I tried to reproduce
the scenario in its minimal version and the problem is still there. 

STEPS TO REPRODUCE
1. Create a new directory
2. Create a fifo inside the new directory with mkfifo
3. Open the new directory with Dolphin

OBSERVED RESULT

Dolphin freezes. Only Title Bar is usable.

EXPECTED RESULT

Dolphin does not freeze.

SOFTWARE/OS VERSIONS

Operating System: KDE neon 5.19
KDE Plasma Version: 5.19.4
KDE Frameworks Version: 5.72.0
Qt Version: 5.14.2
Kernel Version: 5.4.0-42-generic
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-7600 CPU @ 3.50GHz
Memory: 7.7 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 630

ADDITIONAL INFORMATION

The freeze also occurs disabling file previews and using any of the view modes.

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