Update list-related CPython tests to v3.14.2 (#7000)

Lib/test/test_list.py

@@ -1,8 +1,10 @@
+import signal
 import sys
 import textwrap
-from test import list_tests
+from test import list_tests, support
 from test.support import cpython_only
-from test.support.script_helper import assert_python_ok
+from test.support.import_helper import import_module
+from test.support.script_helper import assert_python_failure, assert_python_ok
 import pickle
 import unittest
 
@@ -48,7 +50,7 @@ class ListTest(list_tests.CommonTest):
         with self.assertRaisesRegex(TypeError, 'keyword argument'):
             list(sequence=[])
 
-    @unittest.expectedFailure # TODO: RUSTPYTHON
+    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_keywords_in_subclass(self):
         class subclass(list):
             pass
@@ -329,6 +331,25 @@ class ListTest(list_tests.CommonTest):
             a.append(4)
             self.assertEqual(list(it), [])
 
+    @support.cpython_only
+    def test_no_memory(self):
+        # gh-118331: Make sure we don't crash if list allocation fails
+        import_module("_testcapi")
+        code = textwrap.dedent("""
+        import _testcapi, sys
+        # Prime the freelist
+        l = [None]
+        del l
+        _testcapi.set_nomemory(0)
+        l = [None]
+        """)
+        rc, _, _ = assert_python_failure("-c", code)
+        if support.MS_WINDOWS:
+            # STATUS_ACCESS_VIOLATION
+            self.assertNotEqual(rc, 0xC0000005)
+        else:
+            self.assertNotEqual(rc, -int(signal.SIGSEGV))
+
     def test_deopt_from_append_list(self):
         # gh-132011: it used to crash, because
         # of `CALL_LIST_APPEND` specialization failure.

Lib/test/test_listcomps.py

@@ -609,7 +609,7 @@ class ListComprehensionTest(unittest.TestCase):
             result = snapshot = None
             try:
                 result = [{func}(value) for value in value]
-            except:
+            except ValueError:
                 snapshot = value
                 raise
         """
@@ -643,13 +643,12 @@ class ListComprehensionTest(unittest.TestCase):
             value = [1, None]
             try:
                 [v for v in value].sort()
-            except:
+            except TypeError:
                 pass
         """
         self._check_in_scopes(code, {"value": [1, None]})
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
+    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_frame_locals(self):
         code = """
             val = "a" in [sys._getframe().f_locals for a in [0]][0]
@@ -718,7 +717,7 @@ class ListComprehensionTest(unittest.TestCase):
 
     def test_exception_locations(self):
         # The location of an exception raised from __init__ or
-        # __next__ should should be the iterator expression
+        # __next__ should be the iterator expression
 
         def init_raises():
             try:
@@ -752,6 +751,28 @@ class ListComprehensionTest(unittest.TestCase):
                 self.assertEqual(f.line[f.colno - indent : f.end_colno - indent],
                                  expected)
 
+    def test_only_calls_dunder_iter_once(self):
+
+        class Iterator:
+
+            def __init__(self):
+                self.val = 0
+
+            def __next__(self):
+                if self.val == 2:
+                    raise StopIteration
+                self.val += 1
+                return self.val
+
+            # No __iter__ method
+
+        class C:
+
+            def __iter__(self):
+                return Iterator()
+
+        self.assertEqual([1, 2], [i for i in C()])
+
 __test__ = {'doctests' : doctests}
 
 def load_tests(loader, tests, pattern):

Lib/test/test_userlist.py

@@ -3,7 +3,6 @@
 from collections import UserList
 from test import list_tests
 import unittest
-from test import support
 
 
 class UserListTest(list_tests.CommonTest):
@@ -69,9 +68,7 @@ class UserListTest(list_tests.CommonTest):
 
     # Decorate existing test with recursion limit, because
     # the test is for C structure, but `UserList` is a Python structure.
-    test_repr_deep = support.infinite_recursion(25)(
-        list_tests.CommonTest.test_repr_deep,
-    )
+    test_repr_deep = list_tests.CommonTest.test_repr_deep
 
 if __name__ == "__main__":
     unittest.main()