Merged revisions 79034 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r79034 | benjamin.peterson | 2010-03-17 15:41:42 -0500 (Wed, 17 Mar 2010) | 1 line

  prevent lambda functions from having docstrings #8164
........

Lib/test/test_compile.py

@@ -292,9 +292,9 @@ if 1:
         f1, f2 = f()
         self.assertNotEqual(id(f1.__code__), id(f2.__code__))
 
-##     def test_unicode_encoding(self):
-##         code = "# -*- coding: utf-8 -*-\npass\n"
-##         self.assertRaises(SyntaxError, compile, code, "tmp", "exec")
+    def test_lambda_doc(self):
+        l = lambda: "foo"
+        self.assertIsNone(l.__doc__)
 
     def test_subscripts(self):
         # SF bug 1448804

Python/compile.c

@@ -1660,6 +1660,11 @@ compiler_lambda(struct compiler *c, expr_ty e)
 	if (!compiler_enter_scope(c, name, (void *)e, e->lineno))
 		return 0;
 
+	/* Make None the first constant, so the lambda can't have a
+	   docstring. */
+	if (compiler_add_o(c, c->u->u_consts, Py_None) < 0)
+		return 0;
+	
 	c->u->u_argcount = asdl_seq_LEN(args->args);
 	c->u->u_kwonlyargcount = asdl_seq_LEN(args->kwonlyargs);
 	VISIT_IN_SCOPE(c, expr, e->v.Lambda.body);