During a failure, the ran_jobs result dictionary may not be fully initalized

[dekimsey]

$ fab -v
Fabric 1.4.3
ssh (library) 1.7.14

In my fabfile, one of the commands early on may fail. In normal, serial mode I get typical failure output, in parallel mode however, the program aborts with a KeyError exception. I do not know why the 'results' key in the ran_jobs dictionary may not always be defined. But that appears to be a problem for the following code in fabric/tasks.py's execute method.

              ran_jobs = jobs.run()
              for name, d in ran_jobs.iteritems():
                  import pprint
                  pprint.pprint(d)

                  if d['exit_code'] != 0:
# Problem here, results may not be defined.
                      if isinstance(d['results'], BaseException):
                          error(err, exception=d['results'])
                      else:
                          error(err)
                  results[name] = d['results']

[bitprophet]

This looks like a dupe of #693, which is fixed & will be out in 1.5 and (I think) 1.4.4. Thanks!