diff --git a/ChangeLog b/ChangeLog
index 8bd5332a9b..a32b2107b7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Mon Jun 13 23:38:23 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* parse.y (parser_parse_string): flush delayed token.  based on a
+	  patch by Masaya Tarui in [ruby-dev:43762].  Bug #4544
+
+	* parse.y (yylex): revert r24557.  delayed token at the end of
+	  string should be flushed already by the above change.
+
 Mon Jun 13 23:33:31 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/io/console/console.c (console_dev): console should be
diff --git a/parse.y b/parse.y
index 06f96ce6cd..60e5a3b8b1 100644
--- a/parse.y
+++ b/parse.y
@@ -5984,6 +5984,18 @@ parser_parse_string(struct parser_params *parser, NODE *quote)
 
     tokfix();
     set_yylval_str(STR_NEW3(tok(), toklen(), enc, func));
+
+#ifdef RIPPER
+    if (!NIL_P(parser->delayed)){
+	ptrdiff_t len = lex_p - parser->tokp;
+	if (len > 0) {
+	    rb_enc_str_buf_cat(parser->delayed, parser->tokp, len, enc);
+	}
+	ripper_dispatch_delayed_token(parser, tSTRING_CONTENT);
+	parser->tokp = lex_p;
+    }
+#endif
+
     return tSTRING_CONTENT;
 }
 
@@ -7853,6 +7865,7 @@ yylex(void *p)
 #ifdef RIPPER
     if (!NIL_P(parser->delayed)) {
 	ripper_dispatch_delayed_token(parser, t);
+	return t;
     }
     if (t != 0)
 	ripper_dispatch_scan_event(parser, t);
diff --git a/test/ripper/test_scanner_events.rb b/test/ripper/test_scanner_events.rb
index 25e4b13e6c..9005e46f4e 100644
--- a/test/ripper/test_scanner_events.rb
+++ b/test/ripper/test_scanner_events.rb
@@ -67,10 +67,17 @@ class TestRipper::ScannerEvents < Test::Unit::TestCase
                   [[3, 0], :on_heredoc_end, "EOS"]],
                  Ripper.lex("<<EOS\nheredoc\nEOS")
     assert_equal [[[1, 0], :on_regexp_beg, "/"],
-                  [[1, 1], :on_tstring_content, "foo\n"],
-                  [[2, 0], :on_tstring_content, "bar"],
+                  [[1, 1], :on_tstring_content, "foo\nbar"],
                   [[2, 3], :on_regexp_end, "/"]],
                  Ripper.lex("/foo\nbar/")
+    assert_equal [[[1, 0], :on_regexp_beg, "/"],
+                  [[1, 1], :on_tstring_content, "foo\n\u3020"],
+                  [[2, 3], :on_regexp_end, "/"]],
+                 Ripper.lex("/foo\n\u3020/")
+    assert_equal [[[1, 0], :on_tstring_beg, "'"],
+                  [[1, 1], :on_tstring_content, "foo\n\xe3\x80\xa0"],
+                  [[2, 3], :on_tstring_end, "'"]],
+                 Ripper.lex("'foo\n\xe3\x80\xa0'")
   end
 
   def test_location
@@ -534,6 +541,12 @@ class TestRipper::ScannerEvents < Test::Unit::TestCase
                  scan('tstring_content', '"abc#{1}def"')
     assert_equal ['sym'],
                  scan('tstring_content', ':"sym"')
+    assert_equal ['a b c'],
+                 scan('tstring_content', ':"a b c"'),
+                 "bug#4544"
+    assert_equal ["a\nb\nc"],
+                 scan('tstring_content', ":'a\nb\nc'"),
+                 "bug#4544"
   end
 
   def test_tstring_end