diff --git a/Doc/c-api/buffer.rst b/Doc/c-api/buffer.rst
index c46028b..a172e53 100644
--- a/Doc/c-api/buffer.rst
+++ b/Doc/c-api/buffer.rst
@@ -239,7 +239,7 @@
       | :cmacro:`PyBUF_FULL`         | This is equivalent to ``(PyBUF_INDIRECT |         |
       |                              | PyBUF_FORMAT | PyBUF_WRITABLE)``.                 |
       +------------------------------+---------------------------------------------------+
-      | :cmacro:`PyBUF_FULL_RO``     | This is equivalent to ``(PyBUF_INDIRECT |         |
+      | :cmacro:`PyBUF_FULL_RO`      | This is equivalent to ``(PyBUF_INDIRECT |         |
       |                              | PyBUF_FORMAT)``.                                  |
       +------------------------------+---------------------------------------------------+
       | :cmacro:`PyBUF_CONTIG`       | This is equivalent to ``(PyBUF_ND |               |
diff --git a/Doc/c-api/init.rst b/Doc/c-api/init.rst
index a6f8b9f..d3a2a3b 100644
--- a/Doc/c-api/init.rst
+++ b/Doc/c-api/init.rst
@@ -391,12 +391,12 @@
    single: lock, interpreter
 
 The Python interpreter is not fully thread safe.  In order to support
-multi-threaded Python programs, there's a global lock that must be held by the
-current thread before it can safely access Python objects. Without the lock,
-even the simplest operations could cause problems in a multi-threaded program:
-for example, when two threads simultaneously increment the reference count of
-the same object, the reference count could end up being incremented only once
-instead of twice.
+multi-threaded Python programs, there's a global lock, called the :dfn:`global
+interpreter lock` or :dfn:`GIL`, that must be held by the current thread before
+it can safely access Python objects. Without the lock, even the simplest
+operations could cause problems in a multi-threaded program: for example, when
+two threads simultaneously increment the reference count of the same object, the
+reference count could end up being incremented only once instead of twice.
 
 .. index:: single: setcheckinterval() (in module sys)
 
@@ -425,9 +425,9 @@
 interpreter lock has the following simple structure::
 
    Save the thread state in a local variable.
-   Release the interpreter lock.
+   Release the global interpreter lock.
    ...Do some blocking I/O operation...
-   Reacquire the interpreter lock.
+   Reacquire the global interpreter lock.
    Restore the thread state from the local variable.
 
 This is so common that a pair of macros exists to simplify it::
@@ -444,7 +444,7 @@
 hidden local variable; the :cmacro:`Py_END_ALLOW_THREADS` macro closes the
 block.  Another advantage of using these two macros is that when Python is
 compiled without thread support, they are defined empty, thus saving the thread
-state and lock manipulations.
+state and GIL manipulations.
 
 When thread support is enabled, the block above expands to the following code::
 
@@ -476,7 +476,7 @@
 saves and restores the value of the  global variable :cdata:`errno`, since the
 lock manipulation does not guarantee that :cdata:`errno` is left alone.  Also,
 when thread support is disabled, :cfunc:`PyEval_SaveThread` and
-:cfunc:`PyEval_RestoreThread` don't manipulate the lock; in this case,
+:cfunc:`PyEval_RestoreThread` don't manipulate the GIL; in this case,
 :cfunc:`PyEval_ReleaseLock` and :cfunc:`PyEval_AcquireLock` are not available.
 This is done so that dynamically loaded extensions compiled with thread support
 enabled can be loaded by an interpreter that was compiled with disabled thread
@@ -559,16 +559,16 @@
 
    .. index:: module: _thread
 
-   When only the main thread exists, no lock operations are needed. This is a
+   When only the main thread exists, no GIL operations are needed. This is a
    common situation (most Python programs do not use threads), and the lock
-   operations slow the interpreter down a bit. Therefore, the lock is not created
-   initially.  This situation is equivalent to having acquired the lock:  when
-   there is only a single thread, all object accesses are safe.  Therefore, when
-   this function initializes the lock, it also acquires it.  Before the Python
-   :mod:`_thread` module creates a new thread, knowing that either it has the lock
-   or the lock hasn't been created yet, it calls :cfunc:`PyEval_InitThreads`.  When
-   this call returns, it is guaranteed that the lock has been created and that the
-   calling thread has acquired it.
+   operations slow the interpreter down a bit. Therefore, the lock is not
+   created initially.  This situation is equivalent to having acquired the lock:
+   when there is only a single thread, all object accesses are safe.  Therefore,
+   when this function initializes the global interpreter lock, it also acquires
+   it.  Before the Python :mod:`_thread` module creates a new thread, knowing
+   that either it has the lock or the lock hasn't been created yet, it calls
+   :cfunc:`PyEval_InitThreads`.  When this call returns, it is guaranteed that
+   the lock has been created and that the calling thread has acquired it.
 
    It is **not** safe to call this function when it is unknown which thread (if
    any) currently has the global interpreter lock.
@@ -579,7 +579,7 @@
 .. cfunction:: int PyEval_ThreadsInitialized()
 
    Returns a non-zero value if :cfunc:`PyEval_InitThreads` has been called.  This
-   function can be called without holding the lock, and therefore can be used to
+   function can be called without holding the GIL, and therefore can be used to
    avoid calls to the locking API when running single-threaded.  This function is
    not available when thread support is disabled at compile time.
 
@@ -617,20 +617,20 @@
 
 .. cfunction:: PyThreadState* PyEval_SaveThread()
 
-   Release the interpreter lock (if it has been created and thread support is
-   enabled) and reset the thread state to *NULL*, returning the previous thread
-   state (which is not *NULL*).  If the lock has been created, the current thread
-   must have acquired it.  (This function is available even when thread support is
-   disabled at compile time.)
+   Release the global interpreter lock (if it has been created and thread
+   support is enabled) and reset the thread state to *NULL*, returning the
+   previous thread state (which is not *NULL*).  If the lock has been created,
+   the current thread must have acquired it.  (This function is available even
+   when thread support is disabled at compile time.)
 
 
 .. cfunction:: void PyEval_RestoreThread(PyThreadState *tstate)
 
-   Acquire the interpreter lock (if it has been created and thread support is
-   enabled) and set the thread state to *tstate*, which must not be *NULL*.  If the
-   lock has been created, the current thread must not have acquired it, otherwise
-   deadlock ensues.  (This function is available even when thread support is
-   disabled at compile time.)
+   Acquire the global interpreter lock (if it has been created and thread
+   support is enabled) and set the thread state to *tstate*, which must not be
+   *NULL*.  If the lock has been created, the current thread must not have
+   acquired it, otherwise deadlock ensues.  (This function is available even
+   when thread support is disabled at compile time.)
 
 
 .. cfunction:: void PyEval_ReInitThreads()
@@ -674,60 +674,61 @@
    declaration.  It is a no-op when thread support is disabled at compile time.
 
 All of the following functions are only available when thread support is enabled
-at compile time, and must be called only when the interpreter lock has been
-created.
+at compile time, and must be called only when the global interpreter lock has
+been created.
 
 
 .. cfunction:: PyInterpreterState* PyInterpreterState_New()
 
-   Create a new interpreter state object.  The interpreter lock need not be held,
-   but may be held if it is necessary to serialize calls to this function.
+   Create a new interpreter state object.  The global interpreter lock need not
+   be held, but may be held if it is necessary to serialize calls to this
+   function.
 
 
 .. cfunction:: void PyInterpreterState_Clear(PyInterpreterState *interp)
 
-   Reset all information in an interpreter state object.  The interpreter lock must
-   be held.
+   Reset all information in an interpreter state object.  The global interpreter
+   lock must be held.
 
 
 .. cfunction:: void PyInterpreterState_Delete(PyInterpreterState *interp)
 
-   Destroy an interpreter state object.  The interpreter lock need not be held.
-   The interpreter state must have been reset with a previous call to
+   Destroy an interpreter state object.  The global interpreter lock need not be
+   held.  The interpreter state must have been reset with a previous call to
    :cfunc:`PyInterpreterState_Clear`.
 
 
 .. cfunction:: PyThreadState* PyThreadState_New(PyInterpreterState *interp)
 
-   Create a new thread state object belonging to the given interpreter object.  The
-   interpreter lock need not be held, but may be held if it is necessary to
-   serialize calls to this function.
+   Create a new thread state object belonging to the given interpreter object.
+   The global interpreter lock need not be held, but may be held if it is
+   necessary to serialize calls to this function.
 
 
 .. cfunction:: void PyThreadState_Clear(PyThreadState *tstate)
 
-   Reset all information in a thread state object.  The interpreter lock must be
-   held.
+   Reset all information in a thread state object.  The global interpreter lock
+   must be held.
 
 
 .. cfunction:: void PyThreadState_Delete(PyThreadState *tstate)
 
-   Destroy a thread state object.  The interpreter lock need not be held.  The
-   thread state must have been reset with a previous call to
+   Destroy a thread state object.  The global interpreter lock need not be held.
+   The thread state must have been reset with a previous call to
    :cfunc:`PyThreadState_Clear`.
 
 
 .. cfunction:: PyThreadState* PyThreadState_Get()
 
-   Return the current thread state.  The interpreter lock must be held.  When the
-   current thread state is *NULL*, this issues a fatal error (so that the caller
-   needn't check for *NULL*).
+   Return the current thread state.  The global interpreter lock must be held.
+   When the current thread state is *NULL*, this issues a fatal error (so that
+   the caller needn't check for *NULL*).
 
 
 .. cfunction:: PyThreadState* PyThreadState_Swap(PyThreadState *tstate)
 
    Swap the current thread state with the thread state given by the argument
-   *tstate*, which may be *NULL*.  The interpreter lock must be held.
+   *tstate*, which may be *NULL*.  The global interpreter lock must be held.
 
 
 .. cfunction:: PyObject* PyThreadState_GetDict()
@@ -752,14 +753,15 @@
 
 .. cfunction:: PyGILState_STATE PyGILState_Ensure()
 
-   Ensure that the current thread is ready to call the Python C API regardless of
-   the current state of Python, or of its thread lock. This may be called as many
-   times as desired by a thread as long as each call is matched with a call to
-   :cfunc:`PyGILState_Release`. In general, other thread-related APIs may be used
-   between :cfunc:`PyGILState_Ensure` and :cfunc:`PyGILState_Release` calls as long
-   as the thread state is restored to its previous state before the Release().  For
-   example, normal usage of the :cmacro:`Py_BEGIN_ALLOW_THREADS` and
-   :cmacro:`Py_END_ALLOW_THREADS` macros is acceptable.
+   Ensure that the current thread is ready to call the Python C API regardless
+   of the current state of Python, or of the global interpreter lock. This may
+   be called as many times as desired by a thread as long as each call is
+   matched with a call to :cfunc:`PyGILState_Release`. In general, other
+   thread-related APIs may be used between :cfunc:`PyGILState_Ensure` and
+   :cfunc:`PyGILState_Release` calls as long as the thread state is restored to
+   its previous state before the Release().  For example, normal usage of the
+   :cmacro:`Py_BEGIN_ALLOW_THREADS` and :cmacro:`Py_END_ALLOW_THREADS` macros is
+   acceptable.
 
    The return value is an opaque "handle" to the thread state when
    :cfunc:`PyGILState_Ensure` was called, and must be passed to
@@ -793,35 +795,34 @@
 
 .. index:: single: setcheckinterval() (in module sys)
 
-Every check interval, when the interpreter lock is released and reacquired,
-python will also call any such provided functions.  This can be used for
-example by asynchronous IO handlers.  The notification can be scheduled
-from a worker thread and the actual call than made at the earliest
-convenience by the main thread where it has possession of the global
-interpreter lock and can perform any Python API calls.
+Every check interval, when the global interpreter lock is released and
+reacquired, python will also call any such provided functions.  This can be used
+for example by asynchronous IO handlers.  The notification can be scheduled from
+a worker thread and the actual call than made at the earliest convenience by the
+main thread where it has possession of the global interpreter lock and can
+perform any Python API calls.
 
 .. cfunction:: void Py_AddPendingCall( int (*func)(void *, void *arg) )
 
    .. index:: single: Py_AddPendingCall()
 
-   Post a notification to the Python main thread.  If successful,
-   *func* will be called with the argument *arg* at the earliest
-   convenience.  *func* will be called having the global interpreter
-   lock held and can thus use the full Python API and can take any
-   action such as setting object attributes to signal IO completion.
-   It must return 0 on success, or -1 signalling an exception.
-   The notification function won't be interrupted to perform another
-   asynchronous notification recursively,
-   but it can still be interrupted to switch threads if the interpreter
-   lock is released, for example, if it calls back into python code.
+   Post a notification to the Python main thread.  If successful, *func* will be
+   called with the argument *arg* at the earliest convenience.  *func* will be
+   called having the global interpreter lock held and can thus use the full
+   Python API and can take any action such as setting object attributes to
+   signal IO completion.  It must return 0 on success, or -1 signalling an
+   exception.  The notification function won't be interrupted to perform another
+   asynchronous notification recursively, but it can still be interrupted to
+   switch threads if the global interpreter lock is released, for example, if it
+   calls back into python code.
 
    This function returns 0 on success in which case the notification has been
-   scheduled.  Otherwise, for example if the notification buffer is full,
-   it returns -1 without setting any exception.
+   scheduled.  Otherwise, for example if the notification buffer is full, it
+   returns -1 without setting any exception.
 
-   This function can be called on any thread, be it a Python thread or
-   some other system thread.  If it is a Python thread, it doesn't matter if
-   it holds the global interpreter lock or not.
+   This function can be called on any thread, be it a Python thread or some
+   other system thread.  If it is a Python thread, it doesn't matter if it holds
+   the global interpreter lock or not.
 
    .. versionadded:: 2.7
 
diff --git a/Doc/distutils/setupscript.rst b/Doc/distutils/setupscript.rst
index 85089d0..2985437 100644
--- a/Doc/distutils/setupscript.rst
+++ b/Doc/distutils/setupscript.rst
@@ -334,9 +334,9 @@
 
 There are still some other options which can be used to handle special cases.
 
-The :option:`optional` option is a boolean; if it is true, that specifies that
-a build failure in the extension should not abort the build process, but simply
-not install the failing extension.
+The :option:`optional` option is a boolean; if it is true,
+a build failure in the extension will not abort the build process, but
+instead simply not install the failing extension.
 
 The :option:`extra_objects` option is a list of object files to be passed to the
 linker. These files must not have extensions, as the default extension for the
diff --git a/Doc/make.bat b/Doc/make.bat
index c18e08b..c51fc8d 100644
--- a/Doc/make.bat
+++ b/Doc/make.bat
@@ -4,6 +4,7 @@
 set SVNROOT=http://svn.python.org/projects
 if "%PYTHON%" EQU "" set PYTHON=..\pcbuild\python
 if "%HTMLHELP%" EQU "" set HTMLHELP=%ProgramFiles%\HTML Help Workshop\hhc.exe
+if "%DISTVERSION%" EQU "" for /f "usebackq" %%v in (`%PYTHON% tools/sphinxext/patchlevel.py`) do set DISTVERSION=%%v
 
 if "%1" EQU "" goto help
 if "%1" EQU "html" goto build
@@ -52,7 +53,7 @@
 if not exist build\doctrees mkdir build\doctrees
 cmd /C %PYTHON% --version
 cmd /C %PYTHON% tools\sphinx-build.py -b%1 -dbuild\doctrees . build\%*
-if "%1" EQU "htmlhelp" "%HTMLHELP%" build\htmlhelp\pydoc.hhp
+if "%1" EQU "htmlhelp" "%HTMLHELP%" build\htmlhelp\python%DISTVERSION:.=%.hhp
 goto end
 
 :end
diff --git a/Doc/tools/sphinxext/susp-ignored.csv b/Doc/tools/sphinxext/susp-ignored.csv
index 7e1a289..3f987c7 100644
--- a/Doc/tools/sphinxext/susp-ignored.csv
+++ b/Doc/tools/sphinxext/susp-ignored.csv
@@ -48,6 +48,8 @@
 library/httplib,,:port,host:port
 library/imaplib,,:MM,"""DD-Mmm-YYYY HH:MM:SS +HHMM"""
 library/imaplib,,:SS,"""DD-Mmm-YYYY HH:MM:SS +HHMM"""
+library/itertools,,:stop,elements from seq[start:stop:step]
+library/itertools,,:step,elements from seq[start:stop:step]
 library/linecache,,:sys,"sys:x:3:3:sys:/dev:/bin/sh"
 library/logging,,:And,
 library/logging,,:package1,
diff --git a/Lib/cgitb.py b/Lib/cgitb.py
index ad56df2..7b52c8e 100644
--- a/Lib/cgitb.py
+++ b/Lib/cgitb.py
@@ -142,10 +142,11 @@
             i = lnum - index
             for line in lines:
                 num = small('&nbsp;' * (5-len(str(i))) + str(i)) + '&nbsp;'
-                line = '<tt>%s%s</tt>' % (num, pydoc.html.preformat(line))
                 if i in highlight:
+                    line = '<tt>=&gt;%s%s</tt>' % (num, pydoc.html.preformat(line))
                     rows.append('<tr><td bgcolor="#ffccee">%s</td></tr>' % line)
                 else:
+                    line = '<tt>&nbsp;&nbsp;%s%s</tt>' % (num, pydoc.html.preformat(line))
                     rows.append('<tr><td>%s</td></tr>' % grey(line))
                 i += 1
 
diff --git a/Lib/plistlib.py b/Lib/plistlib.py
index 83e5d04..0cd32ad 100644
--- a/Lib/plistlib.py
+++ b/Lib/plistlib.py
@@ -1,4 +1,4 @@
-"""plistlib.py -- a tool to generate and parse MacOSX .plist files.
+r"""plistlib.py -- a tool to generate and parse MacOSX .plist files.
 
 The PropertList (.plist) file format is a simple XML pickle supporting
 basic object types, like dictionaries, lists, numbers and strings.
diff --git a/Lib/posixpath.py b/Lib/posixpath.py
index 37a2a02..aace2b2 100644
--- a/Lib/posixpath.py
+++ b/Lib/posixpath.py
@@ -257,7 +257,10 @@
         userhome = pwent.pw_dir
     if isinstance(path, bytes):
         userhome = userhome.encode(sys.getfilesystemencoding())
-    userhome = userhome.rstrip(sep)
+        root = b'/'
+    else:
+        root = '/'
+    userhome = userhome.rstrip(root) or userhome
     return userhome + path[i:]
 
 
diff --git a/Lib/socket.py b/Lib/socket.py
index 737930d..15d42ca 100644
--- a/Lib/socket.py
+++ b/Lib/socket.py
@@ -52,7 +52,7 @@
 except ImportError:
     EBADF = 9
 
-__all__ = ["getfqdn"]
+__all__ = ["getfqdn", "create_connection"]
 __all__.extend(os._get_exports_list(_socket))
 
 
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py
index f3e28cc..dec0980 100644
--- a/Lib/test/test_mmap.py
+++ b/Lib/test/test_mmap.py
@@ -357,15 +357,22 @@
                 m.move(source, dest, size)
             except ValueError:
                 pass
-        self.assertRaises(ValueError, m.move, -1, -1, -1)
-        self.assertRaises(ValueError, m.move, -1, -1, 0)
-        self.assertRaises(ValueError, m.move, -1, 0, -1)
-        self.assertRaises(ValueError, m.move, 0, -1, -1)
-        self.assertRaises(ValueError, m.move, -1, 0, 0)
-        self.assertRaises(ValueError, m.move, 0, -1, 0)
-        self.assertRaises(ValueError, m.move, 0, 0, -1)
+
+        offsets = [(-1, -1, -1), (-1, -1, 0), (-1, 0, -1), (0, -1, -1),
+                   (-1, 0, 0), (0, -1, 0), (0, 0, -1)]
+        for source, dest, size in offsets:
+            self.assertRaises(ValueError, m.move, source, dest, size)
+
         m.close()
 
+        m = mmap.mmap(-1, 1) # single byte
+        self.assertRaises(ValueError, m.move, 0, 0, 2)
+        self.assertRaises(ValueError, m.move, 1, 0, 1)
+        self.assertRaises(ValueError, m.move, 0, 1, 1)
+        m.move(0, 0, 1)
+        m.move(0, 0, 0)
+
+
     def test_anonymous(self):
         # anonymous mmap.mmap(-1, PAGE)
         m = mmap.mmap(-1, PAGESIZE)
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 0136c5e..91e0432 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -660,6 +660,48 @@
     class Win32ErrorTests(unittest.TestCase):
         pass
 
+    class PosixUidGidTests(unittest.TestCase):
+        if hasattr(os, 'setuid'):
+            def test_setuid(self):
+                if os.getuid() != 0:
+                    self.assertRaises(os.error, os.setuid, 0)
+                self.assertRaises(OverflowError, os.setuid, 1<<32)
+
+        if hasattr(os, 'setgid'):
+            def test_setgid(self):
+                if os.getuid() != 0:
+                    self.assertRaises(os.error, os.setgid, 0)
+                self.assertRaises(OverflowError, os.setgid, 1<<32)
+
+        if hasattr(os, 'seteuid'):
+            def test_seteuid(self):
+                if os.getuid() != 0:
+                    self.assertRaises(os.error, os.seteuid, 0)
+                self.assertRaises(OverflowError, os.seteuid, 1<<32)
+
+        if hasattr(os, 'setegid'):
+            def test_setegid(self):
+                if os.getuid() != 0:
+                    self.assertRaises(os.error, os.setegid, 0)
+                self.assertRaises(OverflowError, os.setegid, 1<<32)
+
+        if hasattr(os, 'setreuid'):
+            def test_setreuid(self):
+                if os.getuid() != 0:
+                    self.assertRaises(os.error, os.setreuid, 0, 0)
+                self.assertRaises(OverflowError, os.setreuid, 1<<32, 0)
+                self.assertRaises(OverflowError, os.setreuid, 0, 1<<32)
+
+        if hasattr(os, 'setregid'):
+            def test_setregid(self):
+                if os.getuid() != 0:
+                    self.assertRaises(os.error, os.setregid, 0, 0)
+                self.assertRaises(OverflowError, os.setregid, 1<<32, 0)
+                self.assertRaises(OverflowError, os.setregid, 0, 1<<32)
+else:
+    class PosixUidGidTests(unittest.TestCase):
+        pass
+
 def test_main():
     support.run_unittest(
         FileTests,
@@ -671,7 +713,8 @@
         URandomTests,
         ExecTests,
         Win32ErrorTests,
-        TestInvalidFD
+        TestInvalidFD,
+        PosixUidGidTests
     )
 
 if __name__ == "__main__":
diff --git a/Lib/test/test_posixpath.py b/Lib/test/test_posixpath.py
index 3676e9f..7de94e7 100644
--- a/Lib/test/test_posixpath.py
+++ b/Lib/test/test_posixpath.py
@@ -419,6 +419,11 @@
             self.assert_(isinstance(posixpath.expanduser(b"~root/"), bytes))
             self.assert_(isinstance(posixpath.expanduser(b"~foo/"), bytes))
 
+            orig_home = os.environ['HOME']
+            os.environ['HOME'] = '/'
+            self.assertEqual(posixpath.expanduser("~"), "/")
+            os.environ['HOME'] = orig_home
+
         self.assertRaises(TypeError, posixpath.expanduser)
 
     def test_expandvars(self):
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index 474d855..201f490 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -344,6 +344,8 @@
         self.assertEqual(len(sys.int_info), 2)
         self.assert_(sys.int_info.bits_per_digit % 5 == 0)
         self.assert_(sys.int_info.sizeof_digit >= 1)
+        self.assertEqual(type(sys.int_info.bits_per_digit), int)
+        self.assertEqual(type(sys.int_info.sizeof_digit), int)
         self.assert_(isinstance(sys.hexversion, int))
         self.assert_(isinstance(sys.maxsize, int))
         self.assert_(isinstance(sys.maxunicode, int))
@@ -622,9 +624,9 @@
         check(1, size(vh) + self.longdigit)
         check(-1, size(vh) + self.longdigit)
         PyLong_BASE = 2**sys.int_info.bits_per_digit
-        check(PyLong_BASE, size(vh) + 2*self.longdigit)
-        check(PyLong_BASE**2-1, size(vh) + 2*self.longdigit)
-        check(PyLong_BASE**2, size(vh) + 3*self.longdigit)
+        check(int(PyLong_BASE), size(vh) + 2*self.longdigit)
+        check(int(PyLong_BASE**2-1), size(vh) + 2*self.longdigit)
+        check(int(PyLong_BASE**2), size(vh) + 3*self.longdigit)
         # memory
         check(memoryview(b''), size(h + 'P PP2P2i7P'))
         # module
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 299eafd..fd247ab 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -620,23 +620,23 @@
 static PyObject *
 mmap_move_method(mmap_object *self, PyObject *args)
 {
-	unsigned long dest, src, count;
+	unsigned long dest, src, cnt;
 	CHECK_VALID(NULL);
-	if (!PyArg_ParseTuple(args, "kkk:move", &dest, &src, &count) ||
+	if (!PyArg_ParseTuple(args, "kkk:move", &dest, &src, &cnt) ||
 	    !is_writable(self)) {
 		return NULL;
 	} else {
 		/* bounds check the values */
-		unsigned long pos = src > dest ? src : dest;
-		if (self->size < pos || count > self->size - pos) {
+		if (cnt < 0 || (cnt + dest) < cnt || (cnt + src) < cnt ||
+		   src < 0 || src > self->size || (src + cnt) > self->size ||
+		   dest < 0 || dest > self->size || (dest + cnt) > self->size) {
 			PyErr_SetString(PyExc_ValueError,
-					"source or destination out of range");
+				"source, destination, or count out of range");
 			return NULL;
-		} else {
-			memmove(self->data+dest, self->data+src, count);
-			Py_INCREF(Py_None);
-			return Py_None;
 		}
+		memmove(self->data+dest, self->data+src, cnt);
+		Py_INCREF(Py_None);
+		return Py_None;
 	}
 }
 
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 1d1e299..7b32eda 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -4168,9 +4168,15 @@
 static PyObject *
 posix_setuid(PyObject *self, PyObject *args)
 {
-	int uid;
-	if (!PyArg_ParseTuple(args, "i:setuid", &uid))
+	long uid_arg;
+	uid_t uid;
+	if (!PyArg_ParseTuple(args, "l:setuid", &uid_arg))
 		return NULL;
+	uid = uid_arg;
+	if (uid != uid_arg) {
+		PyErr_SetString(PyExc_OverflowError, "user id too big");
+		return NULL;
+	}
 	if (setuid(uid) < 0)
 		return posix_error();
 	Py_INCREF(Py_None);
@@ -4187,10 +4193,16 @@
 static PyObject *
 posix_seteuid (PyObject *self, PyObject *args)
 {
-	int euid;
-	if (!PyArg_ParseTuple(args, "i", &euid)) {
+	long euid_arg;
+	uid_t euid;
+	if (!PyArg_ParseTuple(args, "l", &euid_arg))
 		return NULL;
-	} else if (seteuid(euid) < 0) {
+	euid = euid_arg;
+	if (euid != euid_arg) {
+		PyErr_SetString(PyExc_OverflowError, "user id too big");
+		return NULL;
+	}
+	if (seteuid(euid) < 0) {
 		return posix_error();
 	} else {
 		Py_INCREF(Py_None);
@@ -4207,10 +4219,16 @@
 static PyObject *
 posix_setegid (PyObject *self, PyObject *args)
 {
-	int egid;
-	if (!PyArg_ParseTuple(args, "i", &egid)) {
+	long egid_arg;
+	gid_t egid;
+	if (!PyArg_ParseTuple(args, "l", &egid_arg))
 		return NULL;
-	} else if (setegid(egid) < 0) {
+	egid = egid_arg;
+	if (egid != egid_arg) {
+		PyErr_SetString(PyExc_OverflowError, "group id too big");
+		return NULL;
+	}
+	if (setegid(egid) < 0) {
 		return posix_error();
 	} else {
 		Py_INCREF(Py_None);
@@ -4227,10 +4245,17 @@
 static PyObject *
 posix_setreuid (PyObject *self, PyObject *args)
 {
-	int ruid, euid;
-	if (!PyArg_ParseTuple(args, "ii", &ruid, &euid)) {
+	long ruid_arg, euid_arg;
+	uid_t ruid, euid;
+	if (!PyArg_ParseTuple(args, "ll", &ruid_arg, &euid_arg))
 		return NULL;
-	} else if (setreuid(ruid, euid) < 0) {
+	ruid = ruid_arg;
+	euid = euid_arg;
+	if (euid != euid_arg || ruid != ruid_arg) {
+		PyErr_SetString(PyExc_OverflowError, "user id too big");
+		return NULL;
+	}
+	if (setreuid(ruid, euid) < 0) {
 		return posix_error();
 	} else {
 		Py_INCREF(Py_None);
@@ -4247,10 +4272,17 @@
 static PyObject *
 posix_setregid (PyObject *self, PyObject *args)
 {
-	int rgid, egid;
-	if (!PyArg_ParseTuple(args, "ii", &rgid, &egid)) {
+	long rgid_arg, egid_arg;
+	gid_t rgid, egid;
+	if (!PyArg_ParseTuple(args, "ll", &rgid_arg, &egid_arg))
 		return NULL;
-	} else if (setregid(rgid, egid) < 0) {
+	rgid = rgid_arg;
+	egid = egid_arg;
+	if (egid != egid_arg || rgid != rgid_arg) {
+		PyErr_SetString(PyExc_OverflowError, "group id too big");
+		return NULL;
+	}
+	if (setregid(rgid, egid) < 0) {
 		return posix_error();
 	} else {
 		Py_INCREF(Py_None);
@@ -4267,9 +4299,15 @@
 static PyObject *
 posix_setgid(PyObject *self, PyObject *args)
 {
-	int gid;
-	if (!PyArg_ParseTuple(args, "i:setgid", &gid))
+	long gid_arg;
+	gid_t gid;
+	if (!PyArg_ParseTuple(args, "l:setgid", &gid_arg))
 		return NULL;
+	gid = gid_arg;
+	if (gid != gid_arg) {
+		PyErr_SetString(PyExc_OverflowError, "group id too big");
+		return NULL;
+	}
 	if (setgid(gid) < 0)
 		return posix_error();
 	Py_INCREF(Py_None);
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index fc12452..bc8f39e 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -1021,7 +1021,7 @@
 {
     if (self->ob_exports > 0) {
         PyErr_SetString(PyExc_SystemError,
-			"deallocated bytearray object has exported buffers");
+                        "deallocated bytearray object has exported buffers");
         PyErr_Print();
     }
     if (self->ob_bytes != 0) {
@@ -2616,10 +2616,10 @@
 
     /* Try to determine the length of the argument. 32 is abitrary. */
     buf_size = _PyObject_LengthHint(arg, 32);
-	if (buf_size == -1) {
-		Py_DECREF(it);
-		return NULL;
-	}
+    if (buf_size == -1) {
+        Py_DECREF(it);
+        return NULL;
+    }
 
     bytes_obj = PyByteArray_FromStringAndSize(NULL, buf_size);
     if (bytes_obj == NULL)
@@ -3063,10 +3063,10 @@
 static PyObject *
 bytes_sizeof(PyByteArrayObject *self)
 {
-	Py_ssize_t res;
+    Py_ssize_t res;
 
-	res = sizeof(PyByteArrayObject) + self->ob_alloc * sizeof(char);
-	return PyLong_FromSsize_t(res);
+    res = sizeof(PyByteArrayObject) + self->ob_alloc * sizeof(char);
+    return PyLong_FromSsize_t(res);
 }
 
 static PySequenceMethods bytes_as_sequence = {
diff --git a/Python/getargs.c b/Python/getargs.c
index a89ee6f..4b0ea84 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -1147,7 +1147,7 @@
 			if ((Py_ssize_t)strlen(ptr) != size) {
 				Py_DECREF(s);
 				return converterr(
-					"(encoded string without NULL bytes)",
+					"encoded string without NULL bytes",
 					arg, msgbuf, bufsize);
 			}
 			*buffer = PyMem_NEW(char, size + 1);