[dolphin] [Bug 418223] New: Copying and pasting folder in place can result in system freeze and corrupted source folder

[Alexander Ewering]

https://bugs.kde.org/show_bug.cgi?id=418223

            Bug ID: 418223
           Summary: Copying and pasting folder in place can result in
                    system freeze and corrupted source folder
           Product: dolphin
           Version: 19.12.2
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: critical
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: ae at seven.systems
                CC: kfm-devel at kde.org
  Target Milestone: ---

This is the first time that happened after a million successful similar
operations, but it is so critical that I will still report it.

I often make a backup of a certain project folder before working on it.

That is, I open dolphin, left-click on the folder to select it, then hit Ctrl-C
Ctrl-V in quick succession to create a copy of it.

This has worked fine at least 1000 times and resulted in the dialog asking to
rename the pasted folder, and then a correct copy operation.

Yesterday however (I can't remember the exact steps because I was in a business
meeting and had people chatting to me etc.), it resulted in:

- The whole desktop freezing upon hitting Ctrl-V
- IMPORTANTLY: The SOURCE (!) folder suddenly being almost COMPLETELY EMPTY.
All regular files were gone, the only thing that was still there was the first
level of sub-folders (all sub-subfolders were gone too, and obviously all files
in them). It is almost as if dolphin had "forgotten" to ask for a new folder
name and had recursively tried to copy the folder into itself!

It will probably be impossible to reproduce for you, but I swear it has
happened and it is so critical that I simply had to report it despite not
having good information for reproduction.

I don't think it's a hardware failure (though it was on an external USB SSD). I
checked all logs, among them /var/log/syslog, and there are no unusual error
messages for the time period where it happened (I can pinpoint the time period
because I switched to a different tty when the desktop froze and I see getty
starting up).

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