SF patch 1631942 by Collin Winter:

(a) "except E, V" -> "except E as V"
(b) V is now limited to a simple name (local variable)
(c) V is now deleted at the end of the except block

Python/graminit.c

@@ -1049,7 +1049,7 @@ static arc arcs_46_1[2] = {
 	{0, 1},
 };
 static arc arcs_46_2[2] = {
-	{28, 3},
+	{83, 3},
 	{0, 2},
 };
 static arc arcs_46_3[1] = {