bpo-31829: Make protocol 0 pickles be loadable in text mode in Python 2. (GH-11859)

Escape ``\r``, ``\0`` and ``\x1a`` (end-of-file on Windows) in Unicode strings.

2 files changed, 18 insertions, 4 deletions

diff --git a/Lib/pickle.py b/Lib/pickle.py
index cb768b2..a67ac7d 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -852,7 +852,10 @@ class _Pickler:
                 self.write(BINUNICODE + pack("<I", n) + encoded)
         else:
             obj = obj.replace("\\", "\\u005c")
+            obj = obj.replace("\0", "\\u0000")
             obj = obj.replace("\n", "\\u000a")
+            obj = obj.replace("\r", "\\u000d")
+            obj = obj.replace("\x1a", "\\u001a")  # EOF on DOS
             self.write(UNICODE + obj.encode('raw-unicode-escape') +
                        b'\n')
         self.memoize(obj)
diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index f6fda9e..f8f3bc9 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -3067,22 +3067,20 @@ class BadGetattr:
 class AbstractPickleModuleTests(unittest.TestCase):
 
     def test_dump_closed_file(self):
-        import os
         f = open(TESTFN, "wb")
         try:
             f.close()
             self.assertRaises(ValueError, self.dump, 123, f)
         finally:
-            os.remove(TESTFN)
+            support.unlink(TESTFN)
 
     def test_load_closed_file(self):
-        import os
         f = open(TESTFN, "wb")
         try:
             f.close()
             self.assertRaises(ValueError, self.dump, 123, f)
         finally:
-            os.remove(TESTFN)
+            support.unlink(TESTFN)
 
     def test_load_from_and_dump_to_file(self):
         stream = io.BytesIO()
@@ -3106,6 +3104,19 @@ class AbstractPickleModuleTests(unittest.TestCase):
         self.Pickler(f, -1)
         self.Pickler(f, protocol=-1)
 
+    def test_dump_text_file(self):
+        f = open(TESTFN, "w")
+        try:
+            for proto in protocols:
+                self.assertRaises(TypeError, self.dump, 123, f, proto)
+        finally:
+            f.close()
+            support.unlink(TESTFN)
+
+    def test_incomplete_input(self):
+        s = io.BytesIO(b"X''.")
+        self.assertRaises((EOFError, struct.error, pickle.UnpicklingError), self.load, s)
+
     def test_bad_init(self):
         # Test issue3664 (pickle can segfault from a badly initialized Pickler).
         # Override initialization without calling __init__() of the superclass.