diff -r 494f736f5945 Lib/test/test_threading.py
--- a/Lib/test/test_threading.py	Mon Nov 04 11:28:26 2013 +0100
+++ b/Lib/test/test_threading.py	Mon Nov 04 21:54:11 2013 +0100
@@ -84,6 +84,7 @@ class BaseTestCase(unittest.TestCase):
 
 
 class ThreadTests(BaseTestCase):
+    maxDiff = 10000
 
     # Create a bunch of threads, let each do some work, wait until all are
     # done.
@@ -617,6 +618,54 @@ class ThreadTests(BaseTestCase):
                 t.join()
             self.assertRaises(ValueError, bs.release)
 
+    def test_locals_at_exit(self):
+        # Issue #19466: thread locals must not be deleted before destructors
+        # are called
+        rc, out, err = assert_python_ok("-c", """if 1:
+            import threading
+
+            class Atexit:
+                def __del__(self):
+                    print("thread_dict.atexit = %r" % thread_dict.atexit)
+
+            thread_dict = threading.local()
+            thread_dict.atexit = "atexit"
+
+            atexit = Atexit()
+        """)
+        self.assertEqual(out.rstrip(), b"thread_dict.atexit = 'atexit'")
+
+    def test_warnings_at_exit(self):
+        # Issue #19466: try to call most destructors at Python shutdown before
+        # destroying Python thread states
+        filename = __file__
+        rc, out, err = assert_python_ok("-c", """if 1:
+            import time
+            import threading
+
+            def open_sleep():
+                # a warning will be emitted when the open file will be
+                # destroyed (without being explicitly closed) while the daemon
+                # thread is destroyed
+                fileobj = open(%a, 'rb')
+                start.release()
+                time.sleep(60.0)
+
+            start = threading.Lock()
+            start.acquire()
+
+            thread = threading.Thread(target=open_sleep)
+            thread.daemon = True
+            thread.start()
+
+            # wait until the thread started
+            start.acquire()
+            start.release()
+        """ % filename)
+        self.assertRegex(err.rstrip(),
+                         b"^sys:1: ResourceWarning: unclosed file ")
+
+
 class ThreadJoinOnShutdown(BaseTestCase):
 
     def _run_and_join(self, script):
@@ -701,6 +750,10 @@ class ThreadJoinOnShutdown(BaseTestCase)
             import sys
             import time
             import threading
+            import warnings
+
+            # ignore "unclosed file ..." warnings
+            warnings.filterwarnings('ignore', '', ResourceWarning)
 
             thread_has_run = set()
 
diff -r 494f736f5945 Python/pythonrun.c
--- a/Python/pythonrun.c	Mon Nov 04 11:28:26 2013 +0100
+++ b/Python/pythonrun.c	Mon Nov 04 21:54:11 2013 +0100
@@ -566,11 +566,8 @@ Py_Finalize(void)
     _Py_Finalizing = tstate;
     initialized = 0;
 
-    /* Flush stdout+stderr */
-    flush_std_files();
-
-    /* Disable signal handling */
-    PyOS_FiniInterrupts();
+    /* Destroy the state of all threads except the current thread */
+    _PyThreadState_DeleteExcept(tstate);
 
     /* Collect garbage.  This may call finalizers; it's nice to call these
      * before all modules are destroyed.
@@ -585,6 +582,7 @@ Py_Finalize(void)
      * XXX I haven't seen a real-life report of either of these.
      */
     PyGC_Collect();
+
 #ifdef COUNT_ALLOCS
     /* With COUNT_ALLOCS, it helps to run GC multiple times:
        each collection might release some types from the type
@@ -592,6 +590,13 @@ Py_Finalize(void)
     while (PyGC_Collect() > 0)
         /* nothing */;
 #endif
+
+    /* Flush stdout+stderr */
+    flush_std_files();
+
+    /* Disable signal handling */
+    PyOS_FiniInterrupts();
+
     /* Destroy all modules */
     PyImport_Cleanup();