From: Cody Maloney <cmaloney@users.noreply.github.com>
Date: Sat, 22 Nov 2025 04:11:20 +0000 (-0800)
Subject: [3.14] gh-129559: add `bytearray.resize` thread safety test for free-threading (GH... 
X-Git-Tag: v3.14.1~70
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cfcf7652f6ae9be84e1973f2d3b1acb40b04ca53;p=thirdparty%2FPython%2Fcpython.git

[3.14] gh-129559: add `bytearray.resize` thread safety test for free-threading (GH-141739) (#141835)

[3.14] gh-129559: add `bytearray.resize` thread safety test for free-threading  (GH-141739)
(cherry picked from commit 019c315a8e52978da67a3108e441ed5ee376f504)
---

diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
index 08119f5f7697..125771558691 100644
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -2564,6 +2564,10 @@ class FreeThreadingTest(unittest.TestCase):
             c = a.zfill(0x400000)
             assert not c or c[-1] not in (0xdd, 0xcd)
 
+        def resize(b, a):  # MODIFIES!
+            b.wait()
+            a.resize(10)
+
         def check(funcs, a=None, *args):
             if a is None:
                 a = bytearray(b'0' * 0x400000)
@@ -2625,6 +2629,8 @@ class FreeThreadingTest(unittest.TestCase):
         check([clear] + [startswith] * 10)
         check([clear] + [strip] * 10)
 
+        check([clear] + [resize] * 10)
+
         check([clear] + [contains] * 10)
         check([clear] + [subscript] * 10)
         check([clear2] + [ass_subscript2] * 10, None, bytearray(b'0' * 0x400000))