BlockParticipant: OK with "rescue => e"

rufus-treechecker 1.0.7 doesn't choke on it anymore

closes gh-30

ruote.gemspec

@@ -32,7 +32,7 @@ ruote is an open source Ruby workflow engine
   s.add_runtime_dependency 'rufus-dollar', '>= 1.0.4'
   s.add_runtime_dependency 'rufus-mnemo', '>= 1.1.0'
   s.add_runtime_dependency 'rufus-scheduler', '>= 2.0.9'
-  s.add_runtime_dependency 'rufus-treechecker', '>= 1.0.6'
+  s.add_runtime_dependency 'rufus-treechecker', '>= 1.0.7'
 
   s.add_development_dependency 'rake'
   s.add_development_dependency 'json'

test/functional/ft_24_block_participant.rb

@@ -116,6 +116,19 @@ def test_raise_security_error_upon_registering_rogue_block_participant
     end
   end
 
+  # cf https://github.com/jmettraux/ruote/issues/30
+  #
+  def test_begin_rescue_end
+
+    @engine.register 'rogue' do |workitem|
+      begin
+      rescue => e
+      end
+    end
+
+    assert true
+  end
+
   def test_on_cancel_registration
 
     @engine.register 'nemo',