Update Scheduler to protect against infinite loop

If we have running tasks, but we're not listening to these tasks,
we're going to loop forever. So throw an exception in this case.

1 files changed, 2 insertions, 4 deletions

diff --git a/pym/_emerge/Scheduler.py b/pym/_emerge/Scheduler.py
index 5d190428f..fa4825cf2 100644
--- a/pym/_emerge/Scheduler.py
+++ b/pym/_emerge/Scheduler.py
@@ -1681,15 +1681,13 @@ class Scheduler(PollScheduler):
 			self._set_max_jobs(1)
 
 		while self._schedule():
-			if self._poll_event_handlers:
-				self._poll_loop()
+			self._poll_loop()
 
 		while True:
 			self._schedule()
 			if not self._is_work_scheduled():
 				break
-			if self._poll_event_handlers:
-				self._poll_loop()
+			self._poll_loop()
 
 	def _keep_scheduling(self):
 		return bool(not self._terminated_tasks and self._pkg_queue and \