From e36b42e2db46e892d9347ba0408c99b187ba8cb8 Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Mon, 3 May 2021 07:56:05 -0400
Subject: fix: make data collection operations thread-safe

---
 CHANGES.rst | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'CHANGES.rst')

diff --git a/CHANGES.rst b/CHANGES.rst
index 29af7340..3c65e5d8 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -26,6 +26,9 @@ Unreleased
 
 - Dropped support for Python 2.7, PyPy 2, and Python 3.5.
 
+- Data collection is now thread-safe.  There may have been rare instances of
+  exceptions raised in multi-threaded programs.
+
 - Plugins (like the `Django coverage plugin`_) were generating "Already
   imported a file that will be measured" warnings about Django itself.  These
   have been fixed, closing `issue 1150`_.
-- 
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