Import CPython 3.14.6+ stable branch (2026-08-01)

Summary:
Imported python/cpython `3.14.6+` from upstream rev [`3a09a22`](https://www.github.com/python/cpython/commit/3a09a22e7241e2e742898a02589c56e07e6f18e7) (committed 2026-08-01 20:21:13+00:00).

# Commit Info

- Base: (`3.14.6+`) - [`802a2c8`](https://www.github.com/python/cpython/commit/802a2c8b7a91d700c8bf342a27cd096ac444af41) (commit date: 2026-07-31 17:35:03+00:00)
- Imported: (`3.14.6+`) - [`3a09a22`](https://www.github.com/python/cpython/commit/3a09a22e7241e2e742898a02589c56e07e6f18e7) (commit date: 2026-08-01 20:21:13+00:00)

# Noteworthy file changes

- Low-signal files (1 added) (NEWS.d, docs, .github)

Complete list of added/removed files: https://www.internalfb.com/intern/everpaste/?color=0&handle=GOEY3hZ-f2LZ5ocFAM8_NVG-AIFZbr0LAAAz

Reviewed By: itamaro

Differential Revision: D114522388

fbshipit-source-id: f49bd4ed210a3624bf67f41be623f62a18a23868

Author: generatedunixname1734921407115435

Lib/test/test_zoneinfo/test_zoneinfo.py

@@ -316,6 +316,18 @@ def test_unambiguous(self):
                 self.assertEqual(dt.utcoffset(), offset.utcoffset, dt)
                 self.assertEqual(dt.dst(), offset.dst, dt)
 
+    def test_datetime_subclass_negative_components(self):
+        class MinusOneDateTime(datetime):
+            hour = minute = second = -1
+
+        zi = self.zone_from_key("UTC")
+        dt = MinusOneDateTime(2024, 1, 1, tzinfo=zi)
+
+        self.assertEqual(dt.utcoffset(), ZERO)
+        self.assertEqual(dt.dst(), ZERO)
+        self.assertEqual(dt.tzname(), "UTC")
+        self.assertEqual(zi.fromutc(dt), datetime(2024, 1, 1, tzinfo=zi))
+
     def test_folds_and_gaps(self):
         test_cases = []
         for key in self.zones():

Misc/NEWS.d/next/Library/2026-07-29-21-37-39.gh-issue-154892.eQyJ3Z.rst

@@ -0,0 +1,3 @@
+Fix a bug in the C accelerator for :mod:`zoneinfo` where
+:class:`datetime.datetime` subclasses returning ``-1`` for ``hour``,
+``minute``, or ``second`` could incorrectly raise a :exc:`SystemError`.

Modules/_zoneinfo.c

@@ -2308,7 +2308,7 @@ get_local_timestamp(PyObject *dt, int64_t *local_ts)
         }
         hour = PyLong_AsLong(num);
         Py_DECREF(num);
-        if (hour == -1) {
+        if (hour == -1 && PyErr_Occurred()) {
             return -1;
         }
 
@@ -2318,7 +2318,7 @@ get_local_timestamp(PyObject *dt, int64_t *local_ts)
         }
         minute = PyLong_AsLong(num);
         Py_DECREF(num);
-        if (minute == -1) {
+        if (minute == -1 && PyErr_Occurred()) {
             return -1;
         }
 
@@ -2328,7 +2328,7 @@ get_local_timestamp(PyObject *dt, int64_t *local_ts)
         }
         second = PyLong_AsLong(num);
         Py_DECREF(num);
-        if (second == -1) {
+        if (second == -1 && PyErr_Occurred()) {
             return -1;
         }
     }