python
diff --git a/‎Lib/test/test_syntax.py‎
Lines changed: 8 additions & 0 deletions b/‎Lib/test/test_syntax.py‎
Lines changed: 8 additions & 0 deletions
diff --git a/‎Misc/NEWS.d/next/Core and Builtins/2021-12-18-02-37-07.bpo-46110.B6hAfu.rst‎
Lines changed: 2 additions & 0 deletions b/‎Misc/NEWS.d/next/Core and Builtins/2021-12-18-02-37-07.bpo-46110.B6hAfu.rst‎
Lines changed: 2 additions & 0 deletions
@@ -1729,6 +1729,14 @@ def test_syntax_error_on_deeply_nested_blocks(self):
 """
         self._check_error(source, "too many statically nested blocks")
 
+    @support.cpython_only
+    def test_error_on_parser_stack_overflow(self):
+        source = "-" * 100000 + "4"
+        for mode in ["exec", "eval", "single"]:
+            with self.subTest(mode=mode):
+                with self.assertRaises(MemoryError):
+                    compile(source, "<string>", mode)
+
 
 def load_tests(loader, tests, pattern):
     tests.addTest(doctest.DocTestSuite())
 
@@ -0,0 +1,2 @@
+Add a maximum recursion check to the PEG parser to avoid stack overflow.
+Patch by Pablo Galindo
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Add a maximum recursion check to the PEG parser to avoid stack overflow.`
	`2`	`+Patch by Pablo Galindo`