Oh mightiest Qole, the One who gave us humble peasants, forgive my soul for I have sinned...
I was going to try wxmaxima for Debian to check its usability compared to the one ported by Anunakin, so launched Synaptic, refreshed the applications database, checked every update and selected the desired package: around 100Mb where needed between packages to be downloaded and space for the actual installation.
I knew 400Mb where left free after Inkscape installation, so I clicked OK...

The horror!!! I probably remembered wrong, because right in the middle of the installation everything froze: no space left in the Easydebian partition... d'oh!
Killed synaptic, I had to reset the tablet, it hung so I removed the battery and went to sleep...
Now my question is: can I recover my beloved Debian or I have 100% chances I screwed it up so badly it's best to reformat the partition and start anew?

Edit: never mind, some dpkg magic and apt-get clean saved the day and I still have 195Mb free