parser module doesn't support 'raise ... from'

Lib/test/test_parser.py

 import parser
 import unittest
 import sys
 import operator
 from test import support
 
 #
 #  First, we test that we can generate trees from valid source fragments,
 #  and that these valid trees are indeed allowed by the tree-loading side
 #  of the parser module.
@@ skipping 282 matching lines @@
             (6, '', 2, -1),
             (4, '', 2, -1),
             (0, '', 2, -1)],
                          terminals)
 
     def test_extended_unpacking(self):
         self.check_suite("*a = y")
         self.check_suite("x, *b, = m")
         self.check_suite("[*a, *b] = y")
         self.check_suite("for [*x, b] in x: pass")
+
+    def test_raise_statement(self):
+        self.check_suite("raise\n")
+        self.check_suite("raise e\n")
+        self.check_suite("try:\n"
+                         "    suite\n"
+                         "except Exception as e:\n"
+                         "    raise ValueError from e\n")
 
 
 #
 #  Second, we take *invalid* trees and make sure we get ParserError
 #  rejections for them.
 #
 
 class IllegalSyntaxTestCase(unittest.TestCase):
 
     def check_bad_tree(self, tree, label):
@@ skipping 349 matching lines @@
         IllegalSyntaxTestCase,
         CompileTestCase,
         ParserStackLimitTestCase,
         STObjectTestCase,
         OtherParserCase,
     )
 
 
 if __name__ == "__main__":
     test_main()