From 46118573ec9fb6a4ffcf053e6d005c57fd476014 Mon Sep 17 00:00:00 2001
From: Josh Rosenberg <26495692+MojoVampire@users.noreply.github.com>
Date: Wed, 22 May 2024 10:30:36 -0400
Subject: [PATCH] Reduce readers in test_racing_join_replace to 10, use Event
 to synchronize, and perform multiple joins per loop to increase chance of
 repro without synchronization

---
 Lib/test/test_free_threading/test_str.py | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/Lib/test/test_free_threading/test_str.py b/Lib/test/test_free_threading/test_str.py
index b1bd9b43defb6ca..f5e93b7de0aa9b8 100644
--- a/Lib/test/test_free_threading/test_str.py
+++ b/Lib/test/test_free_threading/test_str.py
@@ -42,20 +42,21 @@ def test_racing_join_replace(self):
         '''
         l = [*'abcdefg']
         MAX_ORDINAL = 1_000
-        READERS = 20
+        READERS = 10
+        done_event = Event()
 
         def writer_func():
             for i, c in zip(cycle(range(len(l))),
                             map(chr, range(128, MAX_ORDINAL))):
                 l[i] = c
-            del l[:]  # Empty list to tell readers to exit
+            done_event.set()
 
         def reader_func():
-            while True:
-                empty = not l
+            while not done_event.is_set():
+                ''.join(l)
+                ''.join(l)
+                ''.join(l)
                 ''.join(l)
-                if empty:
-                    break
 
         writer = Thread(target=writer_func)
         readers = []