From 49bb3e31d04d8cd3099503ed8eacafe6a634c2e7 Mon Sep 17 00:00:00 2001
From: Pavel Minaev <int19h@gmail.com>
Date: Thu, 30 Jan 2020 15:30:30 -0800
Subject: [PATCH] Fix https://github.com/microsoft/ptvsd/issues/2053:

Adapter no longer waits for the IDE to connect if all debug servers have disconnected.
---
 src/debugpy/adapter/sessions.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/debugpy/adapter/sessions.py b/src/debugpy/adapter/sessions.py
index a5c523e7..40c5990e 100644
--- a/src/debugpy/adapter/sessions.py
+++ b/src/debugpy/adapter/sessions.py
@@ -303,8 +303,8 @@ def wait_until_ended():
     A session ends when all components that it manages disconnect from it.
     """
     while True:
-        _sessions_changed.wait()
         with _lock:
-            _sessions_changed.clear()
             if not len(_sessions):
                 return
+            _sessions_changed.clear()
+        _sessions_changed.wait()