From 3f016215a8f7fa3e62a6edfbf2f0a3e7ca074d09 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Mon, 17 Aug 2015 20:54:05 -0400
Subject: [PATCH] cmd/yacc: fix compile error in empty grammar

Fixes #12154.

Change-Id: I1e6d1a3479a8a6fc8f53aebd18fb142506110809
Reviewed-on: https://go-review.googlesource.com/13673
Reviewed-by: Rob Pike <r@golang.org>
---
 src/cmd/yacc/yacc.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/cmd/yacc/yacc.go b/src/cmd/yacc/yacc.go
index a63c218b13..4f83f50e46 100644
--- a/src/cmd/yacc/yacc.go
+++ b/src/cmd/yacc/yacc.go
@@ -3473,6 +3473,7 @@ func ($$rcvr *$$ParserImpl) Parse($$lex $$Lexer) int {
 	var $$lval $$SymType
 	var $$VAL $$SymType
 	var $$Dollar []$$SymType
+	_ = $$Dollar // silence set and not used
 	$$S := make([]$$SymType, $$MaxDepth)
 
 	Nerrs := 0   /* number of errors */
-- 
2.50.0