Hide list comp variables and support set comprehensions
diff --git a/Modules/symtablemodule.c b/Modules/symtablemodule.c
index 95edfea..21bf583 100644
--- a/Modules/symtablemodule.c
+++ b/Modules/symtablemodule.c
@@ -33,7 +33,7 @@
 	st = Py_SymtableString(str, filename, start);
 	if (st == NULL)
 		return NULL;
-	t = st->st_symbols;
+	t = st->st_blocks;
 	Py_INCREF(t);
 	PyMem_Free((void *)st->st_future);
 	PySymtable_Free(st);