#3114 fix a bus error when deallocated exceptions were used

1 files changed, 19 insertions, 0 deletions

diff --git a/Lib/test/test_exceptions.py b/Lib/test/test_exceptions.py
index 55a57ba..753e33b 100644
--- a/Lib/test/test_exceptions.py
+++ b/Lib/test/test_exceptions.py
@@ -5,6 +5,8 @@ import sys
 import unittest
 import pickle
 import weakref
+import gc
+import traceback
 
 from test.support import TESTFN, unlink, run_unittest
 
@@ -551,6 +553,23 @@ class ExceptionTests(unittest.TestCase):
             del g
             self.assertEquals(sys.exc_info()[0], TypeError)
 
+    def test_crash_3114(self):
+        # Bug #3114: in its destructor, MyObject retrieves a pointer to a
+        # deallocated exception instance or traceback.
+        class MyObject:
+            def __del__(self):
+                nonlocal e
+                e = sys.exc_info()
+        e = ()
+        try:
+            raise Exception(MyObject())
+        except:
+            pass
+        gc.collect()
+        [0]*10000
+        # Do something with the exception and its traceback
+        traceback.format_exception(*e)
+
 def test_main():
     run_unittest(ExceptionTests)