parse.y: valid suffix word only

* parse.y (parser_str_options): use valid suffix word only, as well as
  numeric literal, for the backward comatibility.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42779 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 2 deletions

diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 2e2872b9f8..5fdbaa61f4 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -2194,11 +2194,14 @@ class TestString < Test::Unit::TestCase
   end
 
   def test_unknown_string_option
-    assert_raises(SyntaxError) do
+    str = nil
+    assert_nothing_raised(SyntaxError) do
       eval(%{
-        "hello"x
+        str = begin"hello"end
       })
     end
+    assert_equal "hello", str
+    assert_not_predicate str, :frozen?
   end
 
   def test_frozen_string