parse.y: zero codepoints

* parse.y (parser_tokadd_utf8): relax restriction to allow zero or
  more codepoints.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57050 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 3 insertions, 5 deletions

diff --git a/parse.y b/parse.y
index 1f16794c8c..8162086033 100644
--- a/parse.y
+++ b/parse.y
@@ -5809,14 +5809,15 @@ parser_tokadd_utf8(struct parser_params *parser, rb_encoding **encp,
 	int c, last = nextc();
 	do c = nextc(); while (ISSPACE(c));
 	pushback(c);
-	do {
+	while (!string_literal || c != close_brace) {
 	    if (regexp_literal) tokadd(last);
 	    if (!parser_tokadd_codepoint(parser, encp, regexp_literal, TRUE)) {
 		return 0;
 	    }
 	    while (ISSPACE(c = nextc())) last = c;
 	    pushback(c);
-	} while (string_literal && c != close_brace);
+	    if (!string_literal) break;
+	}
 
 	if (c != close_brace) {
 	    yyerror("unterminated Unicode escape");
diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 434533fcab..57d03166c7 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -535,9 +535,6 @@ class TestParse < Test::Unit::TestCase
     assert_nothing_raised(SyntaxError, bug) do
       assert_equal(sym, eval(':"foo\u{0}bar"'))
     end
-    assert_raise(SyntaxError) do
-      eval ':"foo\u{}bar"'
-    end
   end
 
   def test_parse_string