[3.9] bpo-11105: reduce the recursion limit for tests. (GH-26605)

isidentical · web-flow · commit 87f502231c6d · 2021-06-08T20:39:47.000+03:00
(cherry picked from commit e58d762) Co-authored-by: Batuhan Taskaya <batuhan@python.org>
diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
@@ -3199,3 +3199,13 @@ def skip_if_broken_multiprocessing_synchronize():
             synchronize.Lock(ctx=None)
         except OSError as exc:
             raise unittest.SkipTest(f"broken multiprocessing SemLock: {exc!r}")
+
+
+@contextlib.contextmanager
+def infinite_recursion(max_depth=75):
+    original_depth = sys.getrecursionlimit()
+    try:
+        sys.setrecursionlimit(max_depth)
+        yield
+    finally:
+        sys.setrecursionlimit(original_depth)
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
@@ -1031,15 +1031,17 @@ def test_recursion_direct(self):
         e = ast.UnaryOp(op=ast.Not(), lineno=0, col_offset=0)
         e.operand = e
         with self.assertRaises(RecursionError):
-            compile(ast.Expression(e), "<test>", "eval")
+            with support.infinite_recursion():
+                compile(ast.Expression(e), "<test>", "eval")
 
     def test_recursion_indirect(self):
         e = ast.UnaryOp(op=ast.Not(), lineno=0, col_offset=0)
         f = ast.UnaryOp(op=ast.Not(), lineno=0, col_offset=0)
         e.operand = f
         f.operand = e
         with self.assertRaises(RecursionError):
-            compile(ast.Expression(e), "<test>", "eval")
+            with support.infinite_recursion():
+                compile(ast.Expression(e), "<test>", "eval")
 
 
 class ASTValidatorTests(unittest.TestCase):
