fixed infinite loop issues

Author: wolph

progressbar/bar.py

@@ -532,8 +532,10 @@ def __next__(self):
             return value
         except StopIteration:
             self.finish()
+            raise
         except GeneratorExit:
             self.finish(dirty=True)
+            raise
 
     def __exit__(self, exc_type, exc_value, traceback):
         self.finish(dirty=bool(exc_type))