[dolphin] [Bug 472716] New: Copying a large selection of files (2000+) often does not copy some of them

[Valeri]

https://bugs.kde.org/show_bug.cgi?id=472716

            Bug ID: 472716
           Summary: Copying a large selection of files (2000+) often does
                    not copy some of them
    Classification: Applications
           Product: dolphin
           Version: 23.04.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: v19930312 at gmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
Selecting a large number of files and then copying them tends to not copy at
least some without any apparent error or warning message from dolphin. This may
make user erroneously believe that operation (in the sense of copying all files
to destination) succeeded while it actually did not - which is what happened to
me in regards to a large dataset I've been copying.


STEPS TO REPRODUCE
1. Run the following commands in bash to generate a directory with 3000 empty
files:
1.1 mkdir /tmp/dolphin_copy_test_src /tmp/dolphin_copy_test_dst
1.2 cd /tmp/dolphin_copy_test_src
1.3 for ((i=1;i<=3000;i++)); do touch $(uuidgen); done
2. Open Dolphin file manager, preferably from terminal
3. Navigate to /tmp/dolphin_copy_test_src
4. Press Ctrl+A to select all 3000 files in directory
5. Press Ctrl+C to copy files; at this point console will be spammed with

QDBusConnection: error: could not send message to service
"org.freedesktop.portal.Documents" path "/org/freedesktop/portal/documents"
interface "org.freedesktop.portal.FileTransfer" member "AddFiles": Marshalling
failed: Invalid file descriptor passed in arguments

6. Navigate to /tmp/dolphin_copy_test_dst
7. Press Ctrl+V to paste files you've copied

OBSERVED RESULT
Only some files will be copied - target directory will contain less than 3000
files. The exact number I've seen in my tests varies from around 1500 to around
2700. Pasting again will results in the exact same files being copied until one
selects some files to copy again.

EXPECTED RESULT
All 3000 files are copied.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION
None.

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