It's just an hack, but release 20120522 provides a quickstart change
that avoids the crash.
Quickstarting again the project on a virtual environment created with
that release should cause the crash anymore when doing setup.py
For people that use 2.1.5 with ToscaWidgets2 they can work around the
issue by placing at the head of their project setup.py:
On Tue, May 22, 2012 at 9:14 PM, Alessandro Molina