[dolphin] [Bug 430441] New: Dolphin 20.12.0 segmentation faults

[Aurélien Oudelet]

https://bugs.kde.org/show_bug.cgi?id=430441

            Bug ID: 430441
           Summary: Dolphin 20.12.0 segmentation faults
           Product: dolphin
           Version: 20.12.0
          Platform: Mageia RPMs
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: panels: places
          Assignee: dolphin-bugs-null at kde.org
          Reporter: aoudelet at outlook.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 134101
  --> https://bugs.kde.org/attachment.cgi?id=134101&action=edit
Log file from journalctl when reproducing Dolphin segfault

SUMMARY
Dolphin by default shows now Disk usage bar. (See attached screenshot.)
Browsing through directory/files is OK.
Click everywhere on UI is OK

But, in Places panel:
Dolphin 20.12.0 segfaults when I want to drag-drop mounted disk-partitions
listed in left bar.

See attached reproducible segfault in a log attached.

STEPS TO REPRODUCE
1. Open Dolphin
2. Try to drag and drop (rearrange order) by click on a item (root partition
for example) and move mouse cursor while hold click on the selected mounted
linux partitions.
3. Observe a segfault. Dolphin unexpectedly quits.

OBSERVED RESULT
Segmentation fault:
kernel: dolphin[5413]: segfault at 10 ip 00007f880ff3e457 sp 00007fff993a1410
error 4 in libkdeinit5_dolphin.so[7f880ff10000+69000]
kernel: Code: 2f af fe ff 48 85 db 0f 84 fe fe ff ff 4c 89 e7 4c 8d 74 24 40 e8
99 6c fd ff 48 8b 45 00 48 89 ee 4c 89 ff ff 90 78 01 00 00 <41> 8b 4d 10 66 0f
ef d2 41 8b 45 18 f2 0f 10 0b 66 0f ef c0 4c 89

EXPECTED RESULT
Arrange mounted partitions in Places panel.
Note that the workaround functions well: to manually rearrange mounted
disk-partitions listed by Dolphin, use Open/Save dialog from a Plasma
application like Kate/Kwrite, Select Files => Save. In opened dialog, you can
rearrange mounted disk-partitions without segfault.

SOFTWARE/OS VERSIONS
Operating System: Mageia 8
KDE Plasma Version: 5.20.4
KDE Frameworks Version: 5.76.0
Qt Version: 5.15.2
Kernel Version: 5.10.1-desktop-1.mga8
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-6600K CPU @ 3.50GHz
Memory: 15.6 Gio of RAM
Graphics Processor: GeForce GTX 1660 Ti/PCIe/SSE2

ADDITIONAL INFORMATION
This affects many users of our distribution Mageia 8, actually in Beta 2 stage,
see downstream bug report here:
https://bugs.mageia.org/show_bug.cgi?id=27819

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