From 14ee79bf7c694186af75bd8be7a008d4269153c2 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Wed, 2 Sep 2020 18:30:19 -0700
Subject: [PATCH 1/2] bpo-41696: Fix handling of debug mode in asyncio.run

This allows PYTHONASYNCIODEBUG or -X dev to enable asyncio debug mode
when using asyncio.run
---
 Lib/asyncio/runners.py                | 5 +++--
 Lib/test/test_asyncio/test_runners.py | 3 +++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Lib/asyncio/runners.py b/Lib/asyncio/runners.py
index 03ce33300eba83..268635d68fb0c0 100644
--- a/Lib/asyncio/runners.py
+++ b/Lib/asyncio/runners.py
@@ -5,7 +5,7 @@
 from . import tasks
 
 
-def run(main, *, debug=False):
+def run(main, *, debug=None):
     """Execute the coroutine and return the result.
 
     This function runs the passed coroutine, taking care of
@@ -39,7 +39,8 @@ async def main():
     loop = events.new_event_loop()
     try:
         events.set_event_loop(loop)
-        loop.set_debug(debug)
+        if debug is not None:
+            loop.set_debug(debug)
         return loop.run_until_complete(main)
     finally:
         try:
diff --git a/Lib/test/test_asyncio/test_runners.py b/Lib/test/test_asyncio/test_runners.py
index 3b58ddee443adf..b9ae02dc3c04e0 100644
--- a/Lib/test/test_asyncio/test_runners.py
+++ b/Lib/test/test_asyncio/test_runners.py
@@ -87,6 +87,9 @@ async def main(expected):
 
         asyncio.run(main(False))
         asyncio.run(main(True), debug=True)
+        with mock.patch('asyncio.coroutines._is_debug_mode', lambda: True):
+            asyncio.run(main(True))
+            asyncio.run(main(False), debug=False)
 
     def test_asyncio_run_from_running_loop(self):
         async def main():

From 8a1b0e3196032de42a056f9478d25de1e5efdc6c Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Thu, 3 Sep 2020 01:35:34 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../NEWS.d/next/Library/2020-09-03-01-35-32.bpo-41696.zkYGre.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Library/2020-09-03-01-35-32.bpo-41696.zkYGre.rst

diff --git a/Misc/NEWS.d/next/Library/2020-09-03-01-35-32.bpo-41696.zkYGre.rst b/Misc/NEWS.d/next/Library/2020-09-03-01-35-32.bpo-41696.zkYGre.rst
new file mode 100644
index 00000000000000..67bbbb857f18cb
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-09-03-01-35-32.bpo-41696.zkYGre.rst
@@ -0,0 +1 @@
+Fix handling of debug mode in :func:`asyncio.run`. This allows setting ``PYTHONASYNCIODEBUG`` or ``-X dev`` to enable asyncio debug mode when using :func:`asyncio.run`.
\ No newline at end of file