Merge remote-tracking branch 'upstream/main' into issubclass_data_pro…

…tocols
python · Fidget-Spinner · Aug 22, 2021 · Aug 23, 2021 · Aug 24, 2021 · Aug 24, 2021
commit f44d3b615cf62dbdf73b2604327fcf644f336e4f
diff --git a/Doc/whatsnew/3.11.rst b/Doc/whatsnew/3.11.rst
@@ -277,10 +277,48 @@ typing
   (Contributed by Ken Jin in :issue:`44975`).
 
 
-Removed
-=======
-* :class:`smtpd.MailmanProxy` is now removed as it is unusable without
-  an external module, ``mailman``. (Contributed by Dong-hee Na in :issue:`35800`.)
+sys
+---
+
+* :func:`sys.exc_info` now derives the ``type`` and ``traceback`` fields
+  from the ``value`` (the exception instance), so when an exception is
+  modified while it is being handled, the changes are reflected in
+  the results of subsequent calls to :func:`exc_info`.
+  (Contributed by Irit Katriel in :issue:`45711`.)
+
+
+threading
+---------
+
+* On Unix, if the ``sem_clockwait()`` function is available in the C library
+  (glibc 2.30 and newer), the :meth:`threading.Lock.acquire` method now uses
+  the monotonic clock (:data:`time.CLOCK_MONOTONIC`) for the timeout, rather
+  than using the system clock (:data:`time.CLOCK_REALTIME`), to not be affected
+  by system clock changes.
+  (Contributed by Victor Stinner in :issue:`41710`.)
+
+
+time
+----
+
+* On Unix, :func:`time.sleep` now uses the ``clock_nanosleep()`` or
+  ``nanosleep()`` function, if available, which has a resolution of 1 nanosecond
+  (10\ :sup:`-9` seconds), rather than using ``select()`` which has a resolution
+  of 1 microsecond (10\ :sup:`-6` seconds).
+  (Contributed by Benjamin Szőke and Victor Stinner in :issue:`21302`.)
+
+* On Windows 8.1 and newer, :func:`time.sleep` now uses a waitable timer based
+  on `high-resolution timers
+  <https://docs.microsoft.com/en-us/windows-hardware/drivers/kernel/high-resolution-timers>`_
+  which has a resolution of 100 nanoseconds (10\ :sup:`-7` seconds). Previously,
+  it had a resolution of 1 millisecond (10\ :sup:`-3` seconds).
+  (Contributed by Benjamin Szőke, Dong-hee Na, Eryk Sun and Victor Stinner in :issue:`21302` and :issue:`45429`.)
+
+
+unicodedata
+-----------
+
+* The Unicode database has been updated to version 14.0.0. (:issue:`45190`).
 
 
 Optimizations
@@ -365,6 +403,7 @@ Deprecated
   as deprecated, its docstring is now corrected).
   (Contributed by Hugo van Kemenade in :issue:`45837`.)
 
+
 Removed
 =======
 

@@ -1612,6 +1612,16 @@ class P(Protocol):
         with self.assertRaisesRegex(TypeError, "@runtime_checkable"):
             isinstance(1, P)
 
+    def test_super_call_init(self):
+        class P(Protocol):
+            x: int
+
+        class Foo(P):
+            def __init__(self):
+                super().__init__()
+
+        Foo()  # Previously triggered RecursionError
+
     def test_runtime_issubclass_with_classvar_data_members(self):
         @runtime_checkable
         class P(Protocol):