From 570f6657b635314f8f537bcdd5203fe085bfb971 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Mon, 7 Aug 2017 12:10:51 +0200
Subject: [PATCH] bpo-31130: Fix test_idle reference leaks

test_configdialog:

* VarTraceTest.setUp() now calls tracers.detach() before calling
  tracers.clear().
* tearDownModule() now calls tracers.clear() after calling
  tracers.detach().
---
 Lib/idlelib/idle_test/test_configdialog.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Lib/idlelib/idle_test/test_configdialog.py b/Lib/idlelib/idle_test/test_configdialog.py
index caeb2b5678778d..6de894a3585be1 100644
--- a/Lib/idlelib/idle_test/test_configdialog.py
+++ b/Lib/idlelib/idle_test/test_configdialog.py
@@ -41,6 +41,7 @@ def tearDownModule():
     global root, dialog
     idleConf.userCfg = usercfg
     tracers.detach()
+    tracers.clear()
     del dialog
     root.update_idletasks()
     root.destroy()
@@ -444,6 +445,7 @@ class VarTraceTest(unittest.TestCase):
 
     def setUp(self):
         changes.clear()
+        tracers.detach()
         tracers.clear()
         self.v1 = IntVar(root)
         self.v2 = BooleanVar(root)