Since I've run the do-release-upgrade command, I cannot use libreoffice.
I tried
sudo apt-get remove --purge libreoffice.core
(which seems to remove most stuff, includinglibreoffice.base
)- and then
sudo apt-get install libreoffice
When I launch it, I see a list of recent documents, but as soon as I try to open anything it crashes.
I tried to launch it via the command line (by typing "libreoffice").
The error is : (soffice 7674): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed
But someone on Arch Linux bug #54594 says that this error message is irrelevant.
Best Answer
I downloaded a new version of libreoffice (6.0.1) from their site and uncompressed the file with ark.
Then I went to the DEBS folder and typed : sudo dpkg -i *.deb
This installed without any trouble LibreOffice 6.0.1 and it hasn't crashed yet. It opened the file I wanted to open in the first place.
This is not a solution, but it'll do as a workaround.