Re: [Python-Dev] Handle errors in cleanup code

Yury in the comment for PR 2108 [1] suggested more complicated code:

do_something() try: do_something_other() except BaseException as ex: try: undo_something() finally: raise ex

And this is still bad, because it loses the back trace. The way we do it is: do_something() try: do_something_other() except BaseException as ex: tb = sys.exc_info()[2] try: undo_something() finally: raise ex, None, tb