diff --git a/ops/base.py b/ops/base.py
index c20163f..f8cf737 100644
--- a/ops/base.py
+++ b/ops/base.py
@@ -14,6 +14,8 @@ def my_quote(data):
 
 
 def split_list(field, data_list):
+    import pdb
+    pdb.set_trace()
     data = dict()
     if not data_list:
         return None