https://bugs.kde.org/show_bug.cgi?id=520652

            Bug ID: 520652
           Summary: Hang when viewing grouped images of JPEG+NEF
    Classification: Applications
           Product: digikam
      Version First 9.0.0
       Reported In:
          Platform: Debian testing
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Preview-Image
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

Created attachment 192603
  --> https://bugs.kde.org/attachment.cgi?id=192603&action=edit
debug log created with QT_LOGGING_RULES

DESCRIPTION
Digikam after previewing a few grouped images of JPEG+NEF images.

Most of my albums consist of groups of 2 items: a JPEG file and a NEF file. 
After downloading images, I group them using "Group by filename".  I created
all of my albums using versions earlier than Digikam 9.0.0.

After upgrading to Digikam 9.0.0, when I preview a group by double-clicking a
thumbnail to open it, and then repeatedly use the right arrow to go to the next
group, after a few groups the application completely locks up.  My window
manager (plasma-desktop) turns the window gray and adds ("Not responding") to
the window title.  top shows the digikam process taking 100% of CPU.

When I tried this with an album with just JPEG images and no groups, this
worked just fine.

STEPS TO REPRODUCE
1. Create an album consisting of groups of 2 items, 1 JPEG image and 1 NEF
image.
2. Scan through a few groups by opening them in the preview tool and pressing
the right arrow key.

OBSERVED RESULT
The application locks up.

EXPECTED RESULT
Digikam quickly loads the next image.

SOFTWARE/OS VERSIONS
$ kinfo
Operating System: Debian GNU/Linux forky/sid
KDE Plasma Version: 6.6.5
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.2
Kernel Version: 7.0.7+deb14-amd64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × 11th Gen Intel® Core™ i7-1165G7 @ 2.80GHz
Memory: 32 GiB of RAM (31.1 GiB usable)
Graphics Processor: Intel® Iris® Xe Graphics

$ digikam --version
digikam 9.0.0

ADDITIONAL INFORMATION
See attached debug log created with QT_LOGGING_RULES.  When the application
hangs, it doesn't

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