From 10e54aeaa234f2806b367c66e3fb4ac6568b39f6 Mon Sep 17 00:00:00 2001
From: Xavier de Gaye <xdegaye@users.sourceforge.net>
Date: Wed, 12 Oct 2016 20:13:24 +0200
Subject: Issue #20766: Fix references leaked by pdb in the handling of SIGINT
 handlers.

---
 Lib/test/test_pdb.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'Lib/test/test_pdb.py')

diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index 45ba5a9685..66a7b5573c 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -911,6 +911,29 @@ def test_pdb_next_command_subiterator():
     (Pdb) continue
     """
 
+def test_pdb_issue_20766():
+    """Test for reference leaks when the SIGINT handler is set.
+
+    >>> def test_function():
+    ...     i = 1
+    ...     while i <= 2:
+    ...         sess = pdb.Pdb()
+    ...         sess.set_trace(sys._getframe())
+    ...         print('pdb %d: %s' % (i, sess._previous_sigint_handler))
+    ...         i += 1
+
+    >>> with PdbTestInput(['continue',
+    ...                    'continue']):
+    ...     test_function()
+    > <doctest test.test_pdb.test_pdb_issue_20766[0]>(6)test_function()
+    -> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
+    (Pdb) continue
+    pdb 1: <built-in function default_int_handler>
+    > <doctest test.test_pdb.test_pdb_issue_20766[0]>(5)test_function()
+    -> sess.set_trace(sys._getframe())
+    (Pdb) continue
+    pdb 2: <built-in function default_int_handler>
+    """
 
 class PdbTestCase(unittest.TestCase):
 
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