Bug#989744: libqt5core5a: 5.15.2+dfsg-7 breaks MIME subclassing logic (which breaks some features in e.g. Dolphin)

[Dennis Filder <d.filder@web.de>]

On Fri, Jun 11, 2021 at 02:12:45PM -0300, Lisandro Damián Nicanor Pérez Meyer wrote:

> According to the patch:
>
>     This change also optimizes QMimeBinaryProvider::addFileNameMatches
>      to have the same logic as xdgmime for glob matching:
>      literals > extensions > other globs
>
> How does xdgmime behaves in your specific case? If xdgmime behaves
> differently then we definitely can call this a bug, but if the
> behavior is the same then not.

xdg-mime calls /usr/bin/ktraderclient5 under the hood which relies on
the same libraries as dolphin.  Consequently it shows me exactly what
I see in Dolphin.

Dmitry Shachnev wrote:

> Dennis, is there any chance you can build qtbase with that part of the patch
> removed? Or maybe you can test a *.deb file I share with you?

.deb file sounds good.  But also: Have you never tried to enable an
application for all file types?  Because that always struck as a very
useful feature, and I am a bit puzzled that apparently only few people
actually use it.

Regards,
Dennis.