From c281c1b4271d81282360d1e996e5dbb09ebb080f Mon Sep 17 00:00:00 2001
From: Mark Thom <markjordanthom@gmail.com>
Date: Sun, 18 Nov 2018 21:51:53 -0700
Subject: [PATCH] offset variable indexing for semi-context notations

---
 src/prolog/lib/dcgs.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/prolog/lib/dcgs.pl b/src/prolog/lib/dcgs.pl
index d92e6d2b..6f3e092f 100644
--- a/src/prolog/lib/dcgs.pl
+++ b/src/prolog/lib/dcgs.pl
@@ -34,7 +34,7 @@ expand_dcgs(Term0, N, (ModHead :- ModBody)) :-
     append(Args, ['$VAR'(N), SemiContextArgs], ModArgs),
     ModHead =.. [RuleName | ModArgs],
     nonvar(Body),
-    expand_body(Body, ModBody, 0, N1).
+    expand_body(Body, ModBody, N, N1).
 expand_dcgs(Term0, N, (ModHead :- ModBody)) :-
     nonvar(Term0),
     Term0 = (Head --> Body),
-- 
2.54.0