1 files changed, 1 insertions, 0 deletions
diff --git a/state.rb b/state.rb
index cf54f75..b8e2964 100644
--- a/state.rb
+++ b/state.rb
@@ -133,6 +133,7 @@ class State
 
 	# Duplicate this class and bring the duplicate up with the given hold attached
 	def fork(hold)
+		raise Consistency Fault, "Fork of live state" unless @status == :down
 		new_one = self.clone
 		new_one.instance_eval do
 			@holds = Set.new [hold]