changeset:   99395:962086677306
parent:      99391:6b08429a3932
parent:      99394:fecb07050aae
user:        Serhiy Storchaka <storchaka@gmail.com>
date:        Mon Nov 30 17:37:13 2015 +0200
files:       Misc/NEWS
description:
Issue #25718: Fixed copying object with state with boolean value is false.


diff -r 6b08429a3932 -r 962086677306 Lib/copy.py
--- a/Lib/copy.py	Mon Nov 30 03:18:29 2015 +0000
+++ b/Lib/copy.py	Mon Nov 30 17:37:13 2015 +0200
@@ -279,7 +279,7 @@
     if n > 2:
         state = info[2]
     else:
-        state = {}
+        state = None
     if n > 3:
         listiter = info[3]
     else:
@@ -293,7 +293,7 @@
     y = callable(*args)
     memo[id(x)] = y
 
-    if state:
+    if state is not None:
         if deep:
             state = deepcopy(state, memo)
         if hasattr(y, '__setstate__'):
diff -r 6b08429a3932 -r 962086677306 Lib/test/test_copy.py
--- a/Lib/test/test_copy.py	Mon Nov 30 03:18:29 2015 +0000
+++ b/Lib/test/test_copy.py	Mon Nov 30 17:37:13 2015 +0200
@@ -213,6 +213,9 @@
                 return self.foo == other.foo
         x = C(42)
         self.assertEqual(copy.copy(x), x)
+        # State with boolean value is false (issue #25718)
+        x = C(0.0)
+        self.assertEqual(copy.copy(x), x)
 
     # The deepcopy() method
 
@@ -517,6 +520,12 @@
         self.assertEqual(y, x)
         self.assertIsNot(y, x)
         self.assertIsNot(y.foo, x.foo)
+        # State with boolean value is false (issue #25718)
+        x = C([])
+        y = copy.deepcopy(x)
+        self.assertEqual(y, x)
+        self.assertIsNot(y, x)
+        self.assertIsNot(y.foo, x.foo)
 
     def test_deepcopy_reflexive_inst(self):
         class C:
diff -r 6b08429a3932 -r 962086677306 Misc/NEWS
--- a/Misc/NEWS	Mon Nov 30 03:18:29 2015 +0000
+++ b/Misc/NEWS	Mon Nov 30 17:37:13 2015 +0200
@@ -107,6 +107,8 @@
 Library
 -------
 
+- Issue #25718: Fixed copying object with state with boolean value is false.
+
 - Issue #10131: Fixed deep copying of minidom documents.  Based on patch
   by Marian Ganisin.