[dolphin] [Bug 501663] Opening invalid files in dolphin results in infinite loop

[usr_40476]

https://bugs.kde.org/show_bug.cgi?id=501663

--- Comment #4 from usr_40476 <usr_40476 at icloud.com> ---
(In reply to TraceyC from comment #3)
> Thanks for the reproduction steps and the screen recording. That helps.
> I'm not able to reproduce this on git-master. When I try opening the dummy
> file in Dolphin, I get the "Choose Application" dialog asking me to choose
> an application to open the file with. I can cancel out of that and Dolphin
> continues to behave as I expect.
> 
> In Plasma 6.3.3, the system tries to open the file with the Fooyin music
> player for some reason, but Fooyin opens and Dolphin remains OK
> (This seems to be because one of the data file associations is associated
> with Fooyin)
> 
> Did you choose something in the past to open this file?
> You might also look through ~/.config/mimeapps.list and see if Dolphin is in
> there
> 
> This is definitely bad behavior, but we need to know more about why this
> happens on your system but not on mine.

So my hypothesis is this:

[Default Applications]
application/octet-stream=org.kde.dolphin.desktop;

dolphin is trying to open a file itself and because of that it keeps recursing
until all tabs of that file are closed

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