1 files changed, 2 insertions, 0 deletions
diff --git a/Lib/bdb.py b/Lib/bdb.py
index 747e092..88088a5 100644
--- a/Lib/bdb.py
+++ b/Lib/bdb.py
@@ -319,6 +319,8 @@ class Bdb:
         while t is not None:
             stack.append((t.tb_frame, t.tb_lineno))
             t = t.tb_next
+        if f is None:
+            i = max(0, len(stack) - 1)
         return stack, i
 
     #