Jiwon Seo's PEP 3102 implementation.
See SF#1549670.
The compiler package has not yet been updated.
diff --git a/Modules/pyexpat.c b/Modules/pyexpat.c
index 603beed..87a16ef 100644
--- a/Modules/pyexpat.c
+++ b/Modules/pyexpat.c
@@ -279,6 +279,7 @@
         filename = PyString_FromString(__FILE__);
         handler_info[slot].tb_code =
             PyCode_New(0,		/* argcount */
+                       0,       /* kwonlyargcount */
                        0,		/* nlocals */
                        0,		/* stacksize */
                        0,		/* flags */