actorlib/sim/SimActor: do not drive busy low when generator yields None

2012-12-14 23:56:03 +01:00 · 2012-12-14 23:56:03 +01:00 · 1f350adf14
parent a67f483f0f
commit 1f350adf14
1 changed files with 1 additions and 1 deletions
--- a/migen/actorlib/sim.py
+++ b/migen/actorlib/sim.py
@ -60,7 +60,7 @@ class TokenExchanger(PureSimulable):
 			self.active = set()
 		else:
 			raise TypeError
-		if all(transaction.idle_wait for transaction in self.active):
+		if self.active and all(transaction.idle_wait for transaction in self.active):
 			self.busy = False
 	
 	def do_simulation(self, s):