id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
741	Session unpickler is not fault tolerant	django@…	Adrian Holovaty	"Sessions store Python objects via pickle.  Currently unpickling errors are not handled.

For example, if a client visits a site and a class instance is pickled into their session and then they later return to the site after the definition of that class has been removed or changed an !ImportError may be thrown.  Unpickling can potentially cause a whole range of Exceptions including !UnpicklingError, !AttributeError, EOFError, !ImportError, and !IndexError.

Probably it would be reasonable to use a broad try/except block and generate a new session if the session cannot be unpickled."	defect	closed	Core (Other)		normal	fixed			Unreviewed	0	0	0	0	0	0