- Issue #14177: marshal.loads() now raises TypeError when given an unicode

string.  Patch by Guilherme Gonçalves.

Lib/test/test_exceptions.py

@@ -38,7 +38,7 @@ class ExceptionTests(unittest.TestCase):
         try:
             try:
                 import marshal
-                marshal.loads('')
+                marshal.loads(b'')
             except EOFError:
                 pass
         finally:

Lib/test/test_marshal.py

@@ -201,7 +201,7 @@ class BugsTestCase(unittest.TestCase):
                 pass
 
     def test_loads_recursion(self):
-        s = 'c' + ('X' * 4*4) + '{' * 2**20
+        s = b'c' + (b'X' * 4*4) + b'{' * 2**20
         self.assertRaises(ValueError, marshal.loads, s)
 
     def test_recursion_limit(self):
@@ -274,6 +274,11 @@ class BugsTestCase(unittest.TestCase):
             finally:
                 support.unlink(support.TESTFN)
 
+    def test_loads_reject_unicode_strings(self):
+        # Issue #14177: marshal.loads() should not accept unicode strings
+        unicode_string = 'T'
+        self.assertRaises(TypeError, marshal.loads, unicode_string)
+
 
 def test_main():
     support.run_unittest(IntTestCase,

Misc/ACKS

@@ -371,6 +371,7 @@ Yannick Gingras
 Michael Goderbauer
 Christoph Gohlke
 Tim Golden
+Guilherme Gonçalves
 Tiago Gonçalves
 Chris Gonnerman
 David Goodger

Misc/NEWS

@@ -511,6 +511,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #14177: marshal.loads() now raises TypeError when given an unicode
+  string.  Patch by Guilherme Gonçalves.
+
 - Issue #13550: Remove the debug machinery from the threading module: remove
   verbose arguments from all threading classes and functions.
 

Python/marshal.c

@@ -1384,7 +1384,7 @@ marshal_loads(PyObject *self, PyObject *args)
     char *s;
     Py_ssize_t n;
     PyObject* result;
-    if (!PyArg_ParseTuple(args, "s*:loads", &p))
+    if (!PyArg_ParseTuple(args, "y*:loads", &p))
         return NULL;
     s = p.buf;
     n = p.len;
@@ -1400,10 +1400,10 @@ marshal_loads(PyObject *self, PyObject *args)
 }
 
 PyDoc_STRVAR(loads_doc,
-"loads(string)\n\
+"loads(bytes)\n\
 \n\
-Convert the string to a value. If no valid value is found, raise\n\
+Convert the bytes object to a value. If no valid value is found, raise\n\
-EOFError, ValueError or TypeError. Extra characters in the string are\n\
+EOFError, ValueError or TypeError. Extra characters in the input are\n\
 ignored.");
 
 static PyMethodDef marshal_methods[] = {