From c56f61161a7baefb3d1ed3f815e5dc544b3accd6 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 23 Jan 2019 09:39:45 +0000
Subject: [PATCH] parse.y: token name of tSTRING_DEND

* parse.y (rb_yytnamerr): show single-quoted single char as-is, to
  show a quoted closing brace as tSTRING_DEND.  e.g.:

      $ ./ruby -e '"#{true'
      -e:1: syntax error, unexpected end-of-input, expecting '}'

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66911 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 parse.y | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/parse.y b/parse.y
index 6ee962ca2c..1f7cf2f53f 100644
--- a/parse.y
+++ b/parse.y
@@ -924,7 +924,8 @@ static void token_info_warn(struct parser_params *p, const char *token, token_in
 %token tSYMBOLS_BEG	"symbol list"
 %token tQSYMBOLS_BEG	"verbatim symbol list"
 %token tSTRING_END	"terminator"
-%token tSTRING_DBEG tSTRING_DEND tSTRING_DVAR tLAMBEG tLABEL_END
+%token tSTRING_DEND	"'}'"
+%token tSTRING_DBEG tSTRING_DVAR tLAMBEG tLABEL_END
 
 /*
  *	precedence table
@@ -11220,6 +11221,12 @@ rb_yytnamerr(char *yyres, const char *yystr)
 		    bquote = 0;
 		    break;
 		}
+		if (yyp[1] && yyp[1] != '\'' && yyp[2] == '\'') {
+		    if (yyres) memcpy(yyres + yyn, yyp, 3);
+		    yyn += 3;
+		    yyp += 2;
+		    break;
+		}
 		goto do_not_strip_quotes;
 
 	      case ',':