[FIX] MultiProc mishandling crashes

Fixes #2300

Author: oesteban

nipype/pipeline/plugins/base.py

@@ -197,13 +197,18 @@ def _get_result(self, taskid):
  def _submit_job(self, node, updatehash=False):
  raise NotImplementedError
 
- def _report_crash(self, node, result=None):
- tb = None
+ def _report_crash(self, node, result=None, traceback=None):
+ # Overwrite traceback if comes with result
+ # to keep compatibility
  if result is not None:
  node._result = result['result']
- tb = result['traceback']
- node._traceback = tb
- return report_crash(node, traceback=tb)
+ if 'traceback' in result:
+ traceback = result['traceback']
+
+ if traceback is not None:
+ node._traceback = traceback
+
+ return report_crash(node, traceback=traceback)
 
  def _clear_task(self, taskid):
  raise NotImplementedError