[Bug #20030] dispatch invalid escaped character without ignoring it

2 files changed, 10 insertions, 0 deletions

diff --git a/test/ripper/test_scanner_events.rb b/test/ripper/test_scanner_events.rb
index 8434cc9c40..9739cdb1eb 100644
--- a/test/ripper/test_scanner_events.rb
+++ b/test/ripper/test_scanner_events.rb
@@ -991,6 +991,12 @@ class TestRipper::ScannerEvents < Test::Unit::TestCase
     assert_equal("\e", err[2])
   end
 
+  def test_invalid_escape
+    err = nil
+    assert_equal ["\\C-\u{3042}"], scan('tstring_content', %["\\C-\u{3042}"]) {|*e| err = e}
+    assert_equal [:on_parse_error, "Invalid escape character syntax", "\\C-\u{3042}"], err
+  end
+
   def test_invalid_hex_escape
     err = nil
     assert_equal ['U'], scan('tstring_content', '"\\xU"') {|*e| err = e}
diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 2960a3c295..6121205857 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -603,6 +603,10 @@ class TestParse < Test::Unit::TestCase
     assert_equal(' ^~~~~'"\n", e.message.lines.last)
     e = assert_syntax_error('"\M-\U0000"', 'Invalid escape character syntax')
     assert_equal(' ^~~~~'"\n", e.message.lines.last)
+
+    e = assert_syntax_error(%["\\C-\u3042"], 'Invalid escape character syntax')
+    assert_match(/^\s \^(?# \\ ) ~(?# C ) ~(?# - ) ~+(?# U+3042 )$/x, e.message.lines.last)
+    assert_not_include(e.message, "invalid multibyte char")
   end
 
   def test_question