QDesktopServices::openUrl prints "This tool has been deprecated"

Calling

QDesktopServices::openUrl(…);

prints "This tool has been deprecated, use 'gio open' instead. See 'gio help open' for more info."

gnome-desktop 1:3.24.1-1

I just realized that this is the output of xdg-open:

$ xdg-open documents/
This tool has been deprecated, use 'gio open' instead.
See 'gio help open' for more info.

However xdg-open calls

gvfs-open documents/
This tool has been deprecated, use 'gio open' instead.
See 'gio help open' for more info.

which at least opens the directory so it is definitively a fault of xdg-open.

However I decided to post since you may want to hotfix it before xdg-open fixes it.

After further investigations I found out that the call still works on files. However on directories the call randomly silently fails.