Cannot create purchase or Sales invoice

I did git checkout master , then for what I thought was good measure, a bench-update. The update starts out ok,. but it doesnt end well. Everything get up to date , then this:

http://imgur.com/Q0jEWyQ

Trying to login to the web intercace results in a blank page with:

Updating. We will be back in a few moments…

Rather stuck at this point.