[dolphin] [Bug 506999] New: Dolphin crashes on Wayland when opening folder Properties (libQt6Quick.so.6.9.1)

https://bugs.kde.org/show_bug.cgi?id=506999

            Bug ID: 506999
           Summary: Dolphin crashes on Wayland when opening folder
                    Properties (libQt6Quick.so.6.9.1)
    Classification: Applications
           Product: dolphin
      Version First 25.04.3
       Reported In:
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
  Target Milestone: ---

## Summary

Dolphin crashes when opening the Properties dialog for any folder under Wayland
The crash happens whether triggered by the context menu or the keyboard
shortcut Alt+Return The issue does not occur under X11 (`QT_QPA_PLATFORM=xcb`),
suggesting a QtQuick-on-Wayland rendering bug.

---

## Steps to Reproduce

1. Start a Wayland session.
2. Launch Dolphin.
3. Right-click any folder and select **Properties**.
4. Alternatively, select a folder and press **Alt+Return**.
5. Dolphin crashes immediately.

---

## Expected Behavior

The Properties dialog should open normally for folders.

---

## Actual Behavior

- Dolphin crashes with a segmentation fault in `libQt6Quick.so.6.9.1`.
- This occurs with any folder.
- Opening Properties on files does not cause a crash.
- The crash does not occur when using the `xcb` (X11) platform backend.


## Backtrace Snippet (from `dmesg`)
```
[63642.758460] dolphin[7069]: segfault at 597a5103e1db ip 00007604be49dda8 sp
00007ffcda622e00 error 4 in libQt6Quick.so.6.9.1[29dda8,7604be33e000+455000]
likely on CPU 10 (core 10, socket 0)
[63642.758484] Code: ff ff ff 66 0f fe c2 f3 0f e6 c0 0f 29 85 70 ff ff ff e9
c5 fa ff ff 0f 1f 00 48 8b 7b 08 48 8b 07 ff 50 48 48 8b 10 48 89 c7 <ff> 52 78
84 c0 0f 85 74 fa ff ff c6 43 10 01 e9 6b fa ff ff 0f 1f
[63683.719833] dolphin[96135]: segfault at 60fd5cf57608 ip 00007be5b389dda8 sp
00007ffd5d7ba5e0 error 4 in libQt6Quick.so.6.9.1[29dda8,7be5b373e000+455000]
likely on CPU 13 (core 13, socket 0)
[63683.719858] Code: ff ff ff 66 0f fe c2 f3 0f e6 c0 0f 29 85 70 ff ff ff e9
c5 fa ff ff 0f 1f 00 48 8b 7b 08 48 8b 07 ff 50 48 48 8b 10 48 89 c7 <ff> 52 78
84 c0 0f 85 74 fa ff ff c6 43 10 01 e9 6b fa ff ff 0f 1f
[63711.283492] dolphin[96346]: segfault at 5faf2332525f ip 00007d8b8d69dda8 sp
00007ffd627dc5e0 error 4 in libQt6Quick.so.6.9.1[29dda8,7d8b8d53e000+455000]
likely on CPU 0 (core 0, socket 0)
[63711.283514] Code: ff ff ff 66 0f fe c2 f3 0f e6 c0 0f 29 85 70 ff ff ff e9
c5 fa ff ff 0f 1f 00 48 8b 7b 08 48 8b 07 ff 50 48 48 8b 10 48 89 c7 <ff> 52 78
84 c0 0f 85 74 fa ff ff c6 43 10 01 e9 6b fa ff ff 0f 1f
[63887.553412] dolphin[96927]: segfault at 56cfe36e6dc4 ip 00007cded929dda8 sp
00007ffe7f81d9b0 error 4 in libQt6Quick.so.6.9.1[29dda8,7cded913e000+455000]
likely on CPU 29 (core 13, socket 0)
[63887.553435] Code: ff ff ff 66 0f fe c2 f3 0f e6 c0 0f 29 85 70 ff ff ff e9
c5 fa ff ff 0f 1f 00 48 8b 7b 08 48 8b 07 ff 50 48 48 8b 10 48 89 c7 <ff> 52 78
84 c0 0f 85 74 fa ff ff c6 43 10 01 e9 6b fa ff ff 0f 1f
[64048.853041] dolphin[97255]: segfault at 624cb9cf1571 ip 0000792e7269dda8 sp
00007ffcd5bf7d00 error 4 in libQt6Quick.so.6.9.1[29dda8,792e7253e000+455000]
likely on CPU 21 (core 5, socket 0)
[64048.853067] Code: ff ff ff 66 0f fe c2 f3 0f e6 c0 0f 29 85 70 ff ff ff e9
c5 fa ff ff 0f 1f 00 48 8b 7b 08 48 8b 07 ff 50 48 48 8b 10 48 89 c7 <ff> 52 78
84 c0 0f 85 74 fa ff ff c6 43 10 01 e9 6b fa ff ff 0f 1f
[64079.293828] dolphin[97829]: segfault at 63dda6f4a36e ip 00007ffb5989dda8 sp
00007ffce7704310 error 4 in libQt6Quick.so.6.9.1[29dda8,7ffb5973e000+455000]
likely on CPU 11 (core 11, socket 0)
[64079.293851] Code: ff ff ff 66 0f fe c2 f3 0f e6 c0 0f 29 85 70 ff ff ff e9
c5 fa ff ff 0f 1f 00 48 8b 7b 08 48 8b 07 ff 50 48 48 8b 10 48 89 c7 <ff> 52 78
84 c0 0f 85 74 fa ff ff c6 43 10 01 e9 6b fa ff ff 0f 1f
[64115.709327] dolphin[97989]: segfault at 5bdfd1bb4bca ip 00007610a2c9dda8 sp
00007ffd54b108e0 error 4 in libQt6Quick.so.6.9.1[29dda8,7610a2b3e000+455000]
likely on CPU 13 (core 13, socket 0)
[64115.709353] Code: ff ff ff 66 0f fe c2 f3 0f e6 c0 0f 29 85 70 ff ff ff e9
c5 fa ff ff 0f 1f 00 48 8b 7b 08 48 8b 07 ff 50 48 48 8b 10 48 89 c7 <ff> 52 78
84 c0 0f 85 74 fa ff ff c6 43 10 01 e9 6b fa ff ff 0f 1f
[64130.249292] dolphin[98226]: segfault at 64b93c00d2db ip 00007a19a1a9dda8 sp
00007ffe4c213fa0 error 4 in libQt6Quick.so.6.9.1[29dda8,7a19a193e000+455000]
likely on CPU 22 (core 6, socket 0)
[64130.249318] Code: ff ff ff 66 0f fe c2 f3 0f e6 c0 0f 29 85 70 ff ff ff e9
c5 fa ff ff 0f 1f 00 48 8b 7b 08 48 8b 07 ff 50 48 48 8b 10 48 89 c7 <ff> 52 78
84 c0 0f 85 74 fa ff ff c6 43 10 01 e9 6b fa ff ff 0f 1f
```




SOFTWARE/OS VERSIONS
Operating System: EndeavourOS 
KDE Plasma Version: 6.4.2
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1
Kernel Version: 6.12.37-1-lts (64-bit)
Graphics Platform: Wayland
Processors: 32 × AMD Ryzen Threadripper 1950X 16-Core Processor
Graphics Processor 1: AMD Radeon RX 470 Graphics
Graphics Processor 2: llvmpipe

---

## Workaround

Launching Dolphin with the X11 backend avoids the crash.

Additional Notes

  -  Occurs regardless of how Properties dialog is opened (right-click or
Alt+Return).

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