Issue #1717: rename tp_compare to tp_reserved.  I'll change the
type of tp_compare in a separate commit, for ease of reversion
should things go wrong.
diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index b98da20..af0b349 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -662,7 +662,7 @@
     0,                       /* tp_print */
     0,                       /* tp_getattr */
     0,                       /* tp_setattr */
-    0,                       /* tp_compare */
+    0,                       /* tp_reserved */
     0,                       /* tp_repr */
     0,                       /* tp_as_number */
     0,                       /* tp_as_sequence */