From 1f26578da0fa056a58030abd231732d19e59492e Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 21 Nov 2005 13:52:49 +0000
Subject: * parse.y (dsym): prohibit empty symbol literal by interpolation.  
 fixed: [ruby-talk:166529]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@9579 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 parse.y | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'parse.y')

diff --git a/parse.y b/parse.y
index dd0e46b99b..aafc821a87 100644
--- a/parse.y
+++ b/parse.y
@@ -2143,12 +2143,19 @@ dsym		: tSYMBEG xstring_contents tSTRING_END
 			    yyerror("empty symbol literal");
 			}
 			else {
+			    VALUE lit;
+
 			    switch (nd_type($$)) {
 			      case NODE_DSTR:
 				nd_set_type($$, NODE_DSYM);
 				break;
 			      case NODE_STR:
-				if (strlen(RSTRING($$->nd_lit)->ptr) == RSTRING($$->nd_lit)->len) {
+				lit = $$->nd_lit;
+				if (RSTRING(lit)->len == 0) {
+				    yyerror("empty symbol literal");
+				    break;
+				}
+				if (strlen(RSTRING(lit)->ptr) == RSTRING(lit)->len) {
 				    $$->nd_lit = ID2SYM(rb_intern(RSTRING($$->nd_lit)->ptr));
 				    nd_set_type($$, NODE_LIT);
 				    break;
-- 
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