[jsinterp] Fix escape in regex

test/test_jsinterp.py

@@ -352,6 +352,11 @@ def test_regex(self):
         ''')
         self.assertEqual(jsi.call_function('x').flags & re.I, re.I)
 
+        jsi = JSInterpreter('''
+        function x() { let a=/,][}",],()}(\[)/; return a; }
+        ''')
+        self.assertEqual(jsi.call_function('x').pattern, r',][}",],()}(\[)')
+
     def test_char_code_at(self):
         jsi = JSInterpreter('function x(i){return "test".charCodeAt(i)}')
         self.assertEqual(jsi.call_function('x', 0), 116)

test/test_youtube_signature.py

@@ -122,6 +122,10 @@
         'https://www.youtube.com/s/player/113ca41c/player_ias.vflset/en_US/base.js',
         'cgYl-tlYkhjT7A', 'hI7BBr2zUgcmMg',
     ),
+    (
+        'https://www.youtube.com/s/player/c57c113c/player_ias.vflset/en_US/base.js',
+        'M92UUMHa8PdvPd3wyM', '3hPqLJsiNZx7yA',
+    ),
 ]