From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 4 Jun 2026 09:50:39 +0000 (+0200)
Subject: [3.15] Correct Stable ABI documentation for METH_FASTCALL (GH-149593) (GH-150853)
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=5a83d1bb7f6a2cc867c64e543dd78d76833cddb5;p=thirdparty%2FPython%2Fcpython.git

[3.15] Correct Stable ABI documentation for METH_FASTCALL (GH-149593) (GH-150853)

The current documentation says:

>
> METH_FASTCALL
>    Part of the Stable ABI since version 3.7.
>
> [...]
>
>   Added in version 3.7.
>
>    Changed in version 3.10: METH_FASTCALL is now part of the stable ABI.

so is contradictory about when it was added to the Stable ABI.  Looking at the header it seems like 3.10 is right.
(cherry picked from commit 58beae7319c58d850184d621d6635de23f71a229)

Co-authored-by: da-woods <dw-git@d-woods.co.uk>
---

diff --git a/Doc/data/stable_abi.dat b/Doc/data/stable_abi.dat
index 2d4278c9d97c..86080fac7163 100644
--- a/Doc/data/stable_abi.dat
+++ b/Doc/data/stable_abi.dat
@@ -1,7 +1,7 @@
 role,name,added,ifdef_note,struct_abi_kind
 macro,METH_CLASS,3.2,,
 macro,METH_COEXIST,3.2,,
-macro,METH_FASTCALL,3.7,,
+macro,METH_FASTCALL,3.10,,
 macro,METH_METHOD,3.7,,
 macro,METH_NOARGS,3.2,,
 macro,METH_O,3.2,,
diff --git a/Misc/stable_abi.toml b/Misc/stable_abi.toml
index 8fd7aba09241..d59a7c788fa9 100644
--- a/Misc/stable_abi.toml
+++ b/Misc/stable_abi.toml
@@ -1813,7 +1813,6 @@
 [const.METH_COEXIST]
     added = '3.2'
 # METH_STACKLESS is undocumented
-# METH_FASTCALL is not part of limited API.
 
 # The following are defined in private headers, but historically
 # they were exported as part of the stable ABI.
@@ -2149,8 +2148,6 @@
 
 # New method flags in 3.7 (PEP 590):
 
-[const.METH_FASTCALL]
-    added = '3.7'
 [const.METH_METHOD]
     added = '3.7'
 
@@ -2300,6 +2297,10 @@
 [data.PyStructSequence_UnnamedField]
     added = '3.11'
 
+# Added in 3.7 but in the Stable ABI from 3.10
+[const.METH_FASTCALL]
+    added = '3.10'
+
 # Add stable Py_buffer API in Python 3.11 (https://bugs.python.org/issue45459)
 [struct.Py_buffer]
     added = '3.11'