Ignore more exceptions in stubtest (python#11946)

See python/typeshed#6801.

Author: JelleZijlstra

mypy/stubtest.py

@@ -269,11 +269,14 @@ def verify_typeinfo(
             mangled_entry = "_{}{}".format(stub.name, entry)
         stub_to_verify = next((t.names[entry].node for t in stub.mro if entry in t.names), MISSING)
         assert stub_to_verify is not None
-        yield from verify(
-            stub_to_verify,
-            getattr(runtime, mangled_entry, MISSING),
-            object_path + [entry],
-        )
+        try:
+            runtime_attr = getattr(runtime, mangled_entry, MISSING)
+        except Exception:
+            # Catch all exceptions in case the runtime raises an unexpected exception
+            # from __getattr__ or similar.
+            pass
+        else:
+            yield from verify(stub_to_verify, runtime_attr, object_path + [entry])
 
 
 def _verify_static_class_methods(