lib/antlr4/runtime/parser_atn_simulator.rb in antlr4-runtime-0.2.1 vs lib/antlr4/runtime/parser_atn_simulator.rb in antlr4-runtime-0.2.2

@@ -790,20 +790,20 @@
               end
             end
 
             c.reaches_into_outer_context += 1
 
-            added = closure_busy.add?(c)
+            added = !closure_busy.add?(c).nil?
             unless added
               i += 1
               next
             end
 
             configs.dips_into_outer_context = true # TODO: can remove? only care when we add to set per middle of this method
             new_depth -= 1
             puts('dips into outer ctx: ' << c.to_s) if @debug
           else
-            added = closure_busy.add?(c)
+            added = !closure_busy.add?(c).nil?
             if !t.epsilon? && !added
               i += 1
               next
             end