.

Author: hauntsaninja

mypy/stubgen.py

@@ -1773,11 +1773,9 @@ def generate_asts_for_modules(
         mod.ast = res.graph[mod.module].tree
         # Use statically inferred __all__ if there is no runtime one.
         if mod.runtime_all is None:
-            mod.runtime_all = [
-                name
-                for name, sym in res.manager.semantic_analyzer.modules[mod.module].names.items()
-                if sym.module_public
-            ]
+            mod_names = res.manager.semantic_analyzer.modules[mod.module].names
+            if "__all__" in mod_names:
+                mod.runtime_all = [name for name, sym in mod_names.items() if sym.module_public]
 
 
 def generate_stub_for_py_module(