Problem localization?

patacrep/songs/chordpro/syntax.py

@@ -303,6 +303,10 @@ class ChordproParser(Parser):
 
     def p_error(self, token):
         super().p_error(token)
+        if not token:
+            # End of file
+            # Maybe it should raise an error ?
+            return token
         while True:
             token = self.parser.token()
             if not token or token.type == "ENDOFLINE":