Fix stepping into a frame without a __name__ (GH-12064)

1 files changed, 2 insertions, 0 deletions

diff --git a/Lib/bdb.py b/Lib/bdb.py
index 25c6260..ec0f92c 100644
--- a/Lib/bdb.py
+++ b/Lib/bdb.py
@@ -190,6 +190,8 @@ class Bdb:
 
     def is_skipped_module(self, module_name):
         "Return True if module_name matches any skip pattern."
+        if module_name is None:  # some modules do not have names
+            return False
         for pattern in self.skip:
             if fnmatch.fnmatch(module_name, pattern):
                 return True