diff --git a/Doc/c-api/exceptions.rst b/Doc/c-api/exceptions.rst
index 2148463..9413762 100644
--- a/Doc/c-api/exceptions.rst
+++ b/Doc/c-api/exceptions.rst
@@ -355,6 +355,16 @@
    .. % thread.interrupt_main() (used from IDLE), so it's still needed.
 
 
+.. cfunction:: int PySignal_SetWakeupFd(int fd)
+
+   This utility function specifies a file descriptor to which a ``'\0'`` byte will
+   be written whenever a signal is received.  It returns the previous such file
+   descriptor.  The value ``-1`` disables the feature; this is the initial state.
+   This is equivalent to :func:`signal.set_wakeup_fd` in Python, but without any
+   error checking.  *fd* should be a valid file descriptor.  The function should
+   only be called from the main thread.
+
+
 .. cfunction:: PyObject* PyErr_NewException(char *name, PyObject *base, PyObject *dict)
 
    This utility function creates and returns a new exception object. The *name*
diff --git a/Doc/library/signal.rst b/Doc/library/signal.rst
index d3c498d..920752b 100644
--- a/Doc/library/signal.rst
+++ b/Doc/library/signal.rst
@@ -110,6 +110,20 @@
    :manpage:`signal(2)`.)
 
 
+.. function:: set_wakeup_fd(fd)
+
+   Set the wakeup fd to *fd*.  When a signal is received, a ``'\0'`` byte is
+   written to the fd.  This can be used by a library to wakeup a poll or select
+   call, allowing the signal to be fully processed.
+
+   The old wakeup fd is returned.  *fd* must be non-blocking.  It is up to the
+   library to remove any bytes before calling poll or select again.
+
+   When threads are enabled, this function can only be called from the main thread;
+   attempting to call it from other threads will cause a :exc:`ValueError`
+   exception to be raised.
+
+
 .. function:: signal(signalnum, handler)
 
    Set the handler for signal *signalnum* to the function *handler*.  *handler* can
diff --git a/Doc/whatsnew/2.6.rst b/Doc/whatsnew/2.6.rst
index e5a8d22..b29cb7b 100644
--- a/Doc/whatsnew/2.6.rst
+++ b/Doc/whatsnew/2.6.rst
@@ -147,15 +147,16 @@
 The input format is reStructured Text, 
 a markup commonly used in the Python community that supports
 custom extensions  and directives.   Sphinx concentrates 
-on its HTML output, producing attractively styled 
-and modern HTML. (XXX finish this -- mention new search feature)
+on HTML output, producing attractively styled 
+and modern HTML, but printed output is still supported through 
+conversion to LaTeX as an output format.
 
 .. seealso::
 
    `Docutils <http://docutils.sf.net>`__: The fundamental
    reStructured Text parser and toolset.
 
-   `Documenting Python <XXX>`__: Describes how to write for 
+   `Documenting Python <http://docs.python.org/dev/documenting/>`__: Describes how to write for 
    Python's documentation.
 
 
@@ -839,6 +840,27 @@
 * The :mod:`sets` module has been deprecated; it's better to 
   use the built-in :class:`set` and :class:`frozenset` types.
 
+* Integrating signal handling with GUI handling event loops 
+  like those used by Tkinter or GTk+ has long been a problem; most
+  software ends up polling, waking up every fraction of a second.  Thi
+  The :mod:`signal` module can now make this more efficient.
+  Calling ``signal.set_wakeup_fd(fd)`` sets a file descriptor
+  to be used; when a signal is received, a byte is written to that 
+  file descriptor.  There's also a C-level function,
+  :cfunc:`PySignal_SetWakeupFd`, for setting the descriptor.
+
+  Event loops will use this by opening a pipe to create two descriptors,
+  one for reading and one for writing.  The writeable descriptor
+  will be passed to :func:`set_wakeup_fd`, and the readable descriptor
+  will be added to the list of descriptors monitored by the event loop via
+  :cfunc:`select` or :cfunc:`poll`.
+  On receiving a signal, a byte will be written and the main event loop 
+  will be woken up, without the need to poll.
+
+  Contributed by Adam Olsen.
+
+  .. % Patch 1583
+
 * The :mod:`smtplib` module now supports SMTP over SSL thanks to the
   addition of the :class:`SMTP_SSL` class. This class supports an
   interface identical to the existing :class:`SMTP` class.   Both 
diff --git a/Include/pyerrors.h b/Include/pyerrors.h
index b499778..ecbb059 100644
--- a/Include/pyerrors.h
+++ b/Include/pyerrors.h
@@ -227,6 +227,9 @@
 PyAPI_FUNC(int) PyErr_CheckSignals(void);
 PyAPI_FUNC(void) PyErr_SetInterrupt(void);
 
+/* In signalmodule.c */
+int PySignal_SetWakeupFd(int fd);
+
 /* Support for adding program text to SyntaxErrors */
 PyAPI_FUNC(void) PyErr_SyntaxLocation(const char *, int);
 PyAPI_FUNC(PyObject *) PyErr_ProgramText(const char *, int);
diff --git a/Lib/decimal.py b/Lib/decimal.py
index b25f6e6..54e8cb4 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -184,7 +184,6 @@
     number of zero digits are appended to the coefficient ("fold-down").
     """
 
-
 class InvalidOperation(DecimalException):
     """An invalid operation was performed.
 
@@ -210,14 +209,10 @@
     """
     def handle(self, context, *args):
         if args:
-            if args[0] == 1:  # sNaN, must drop 's' but keep diagnostics
-                ans = _dec_from_triple(args[1]._sign, args[1]._int, 'n', True)
-                return ans._fix_nan(context)
-            elif args[0] == 2:
-                return _dec_from_triple(args[1], args[2], 'n', True)
+            ans = _dec_from_triple(args[0]._sign, args[0]._int, 'n', True)
+            return ans._fix_nan(context)
         return NaN
 
-
 class ConversionSyntax(InvalidOperation):
     """Trying to convert badly formed string.
 
@@ -277,7 +272,6 @@
     The inexact signal may be tested (or trapped) to determine if a given
     operation (or sequence of operations) was inexact.
     """
-    pass
 
 class InvalidContext(InvalidOperation):
     """Invalid context.  Unknown rounding, for example.
@@ -304,7 +298,6 @@
     The rounded signal may be tested (or trapped) to determine if a given
     operation (or sequence of operations) caused a loss of precision.
     """
-    pass
 
 class Subnormal(DecimalException):
     """Exponent < Emin before rounding.
@@ -316,7 +309,6 @@
     The subnormal signal may be tested (or trapped) to determine if a given
     or operation (or sequence of operations) yielded a subnormal result.
     """
-    pass
 
 class Overflow(Inexact, Rounded):
     """Numerical overflow.
@@ -338,7 +330,7 @@
     the result is the same as for round-down if the sign of the intermediate
     result is 0, or is [1,inf] otherwise.  In all cases, Inexact and Rounded
     will also be raised.
-   """
+    """
 
     def handle(self, context, sign, *args):
         if context.rounding in (ROUND_HALF_UP, ROUND_HALF_EVEN,
@@ -662,7 +654,7 @@
         """Returns whether the number is not actually one.
 
         0 if a number
-        1 if NaN  (it could be a normal quiet NaN or a phantom one)
+        1 if NaN
         2 if sNaN
         """
         if self._is_special:
@@ -708,10 +700,10 @@
 
             if self_is_nan == 2:
                 return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, self)
+                                        self)
             if other_is_nan == 2:
                 return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, other)
+                                        other)
             if self_is_nan:
                 return self._fix_nan(context)
 
@@ -922,7 +914,7 @@
 
         if not self:
             # -Decimal('0') is Decimal('0'), not Decimal('-0')
-            ans = self.copy_sign(Dec_0)
+            ans = self.copy_abs()
         else:
             ans = self.copy_negate()
 
@@ -942,7 +934,7 @@
 
         if not self:
             # + (-0) = 0
-            ans = self.copy_sign(Dec_0)
+            ans = self.copy_abs()
         else:
             ans = Decimal(self)
 
@@ -1465,9 +1457,6 @@
         context - context used.
         """
 
-        if context is None:
-            context = getcontext()
-
         if self._is_special:
             if self._isnan():
                 # decapitate payload if necessary
@@ -1631,11 +1620,9 @@
             if context is None:
                 context = getcontext()
             if self._exp == 'N':
-                return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, self)
+                return context._raise_error(InvalidOperation, 'sNaN', self)
             if other._exp == 'N':
-                return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, other)
+                return context._raise_error(InvalidOperation, 'sNaN', other)
             if self._exp == 'n':
                 product = self
             elif other._exp == 'n':
@@ -1678,13 +1665,13 @@
         if self_is_nan or other_is_nan or modulo_is_nan:
             if self_is_nan == 2:
                 return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, self)
+                                        self)
             if other_is_nan == 2:
                 return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, other)
+                                        other)
             if modulo_is_nan == 2:
                 return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, modulo)
+                                        modulo)
             if self_is_nan:
                 return self._fix_nan(context)
             if other_is_nan:
@@ -2555,16 +2542,16 @@
         other_is_nan = other._isnan()
         if self_is_nan == 2:
             return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, self)
+                                        self)
         if other_is_nan == 2:
             return context._raise_error(InvalidOperation, 'sNaN',
-                                        1, other)
+                                        other)
         if self_is_nan:
             return context._raise_error(InvalidOperation, 'NaN in compare_signal',
-                                        1, self)
+                                        self)
         if other_is_nan:
             return context._raise_error(InvalidOperation, 'NaN in compare_signal',
-                                        1, other)
+                                        other)
         return self.compare(other, context=context)
 
     def compare_total(self, other):
@@ -3208,8 +3195,8 @@
         """Returns an indication of the class of self.
 
         The class is one of the following strings:
-          -sNaN
-          -NaN
+          sNaN
+          NaN
           -Infinity
           -Normal
           -Subnormal
@@ -5173,8 +5160,6 @@
 Dec_0 = Decimal(0)
 Dec_p1 = Decimal(1)
 Dec_n1 = Decimal(-1)
-Dec_p2 = Decimal(2)
-Dec_n2 = Decimal(-2)
 
 # Infsign[sign] is infinity w/ that sign
 Infsign = (Inf, negInf)
diff --git a/Lib/re.py b/Lib/re.py
index 4c5622b..1e0c468 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -224,6 +224,8 @@
         return p
     pattern, flags = key
     if isinstance(pattern, _pattern_type):
+        if flags:
+            raise ValueError('Cannot process flags argument with a compiled pattern')
         return pattern
     if not sre_compile.isstring(pattern):
         raise TypeError("first argument must be string or compiled pattern")
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index f935e1d..88fecbf 100644
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -111,6 +111,14 @@
 #                self.assertEqual(z, y)
 #                self.assertEqual(type(z), type(y))
 
+    def test_bug_1661(self):
+        # Verify that flags do not get silently ignored with compiled patterns
+        pattern = re.compile('.')
+        self.assertRaises(ValueError, re.match, pattern, 'A', re.I)
+        self.assertRaises(ValueError, re.search, pattern, 'A', re.I)
+        self.assertRaises(ValueError, re.findall, pattern, 'A', re.I)
+        self.assertRaises(ValueError, re.compile, pattern, re.I)
+
     def test_sub_template_numeric_escape(self):
         # bug 776311 and friends
         self.assertEqual(re.sub('x', r'\0', 'x'), '\0')
diff --git a/Lib/test/test_richcmp.py b/Lib/test/test_richcmp.py
index efe6923..3f97ece 100644
--- a/Lib/test/test_richcmp.py
+++ b/Lib/test/test_richcmp.py
@@ -85,6 +85,35 @@
             raise ValueError("Cannot compare vectors of different length")
         return other
 
+
+class SimpleOrder(object):
+    """
+    A simple class that defines order but not full comparison.
+    """
+
+    def __init__(self, value):
+        self.value = value
+
+    def __lt__(self, other):
+        if not isinstance(other, SimpleOrder):
+            return True
+        return self.value < other.value
+
+    def __gt__(self, other):
+        if not isinstance(other, SimpleOrder):
+            return False
+        return self.value > other.value
+
+
+class DumbEqualityWithoutHash(object):
+    """
+    A class that define __eq__, but no __hash__: it shouldn't be hashable.
+    """
+
+    def __eq__(self, other):
+        return False
+
+
 opmap = {
     "lt": (lambda a,b: a< b, operator.lt, operator.__lt__),
     "le": (lambda a,b: a<=b, operator.le, operator.__le__),
@@ -330,8 +359,39 @@
         for op in opmap["lt"]:
             self.assertIs(op(x, y), True)
 
+
+class HashableTest(unittest.TestCase):
+    """
+    Test hashability of classes with rich operators defined.
+    """
+
+    def test_simpleOrderHashable(self):
+        """
+        A class that only defines __gt__ and/or __lt__ should be hashable.
+        """
+        a = SimpleOrder(1)
+        b = SimpleOrder(2)
+        self.assert_(a < b)
+        self.assert_(b > a)
+        self.assert_(a.__hash__ is not None)
+
+    def test_notHashableException(self):
+        """
+        If a class is not hashable, it should raise a TypeError with an
+        understandable message.
+        """
+        a = DumbEqualityWithoutHash()
+        try:
+            hash(a)
+        except TypeError as e:
+            self.assertEquals(str(e),
+                              "unhashable type: 'DumbEqualityWithoutHash'")
+        else:
+            raise test_support.TestFailed("Should not be here")
+
+
 def test_main():
-    test_support.run_unittest(VectorTest, NumberTest, MiscTest, DictTest, ListTest)
+    test_support.run_unittest(VectorTest, NumberTest, MiscTest, DictTest, ListTest, HashableTest)
 
 if __name__ == "__main__":
     test_main()
diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index c1df51e..80a0bb2 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -166,12 +166,59 @@
         self.assertRaises(TypeError, signal.signal,
                           signal.SIGUSR1, None)
 
+class WakeupSignalTests(unittest.TestCase):
+    TIMEOUT_FULL = 10
+    TIMEOUT_HALF = 5
+
+    def test_wakeup_fd_early(self):
+        import select
+
+        signal.alarm(1)
+        before_time = time.time()
+        # We attempt to get a signal during the sleep,
+        # before select is called
+        time.sleep(self.TIMEOUT_FULL)
+        mid_time = time.time()
+        self.assert_(mid_time - before_time < self.TIMEOUT_HALF)
+        select.select([self.read], [], [], self.TIMEOUT_FULL)
+        after_time = time.time()
+        self.assert_(after_time - mid_time < self.TIMEOUT_HALF)
+
+    def test_wakeup_fd_during(self):
+        import select
+
+        signal.alarm(1)
+        before_time = time.time()
+        # We attempt to get a signal during the select call
+        self.assertRaises(select.error, select.select,
+            [self.read], [], [], self.TIMEOUT_FULL)
+        after_time = time.time()
+        self.assert_(after_time - before_time < self.TIMEOUT_HALF)
+
+    def setUp(self):
+        import fcntl
+
+        self.alrm = signal.signal(signal.SIGALRM, lambda x,y:None)
+        self.read, self.write = os.pipe()
+        flags = fcntl.fcntl(self.write, fcntl.F_GETFL, 0)
+        flags = flags | os.O_NONBLOCK
+        fcntl.fcntl(self.write, fcntl.F_SETFL, flags)
+        self.old_wakeup = signal.set_wakeup_fd(self.write)
+
+    def tearDown(self):
+        signal.set_wakeup_fd(self.old_wakeup)
+        os.close(self.read)
+        os.close(self.write)
+        signal.signal(signal.SIGALRM, self.alrm)
+
+
 def test_main():
     if sys.platform[:3] in ('win', 'os2'):
         raise test_support.TestSkipped("Can't test signal on %s" % \
                                        sys.platform)
 
-    test_support.run_unittest(BasicSignalTests, InterProcessSignalTests)
+    test_support.run_unittest(BasicSignalTests, InterProcessSignalTests,
+        WakeupSignalTests)
 
 
 if __name__ == "__main__":
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index 806791b..a46bc38 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -242,7 +242,7 @@
         self.assertEquals(rc, 2)
 
     def test_cwd(self):
-        tmpdir = os.getenv("TEMP", "/tmp")
+        tmpdir = tempfile.gettempdir()
         # We cannot use os.path.realpath to canonicalize the path,
         # since it doesn't expand Tru64 {memb} strings. See bug 1063571.
         cwd = os.getcwd()
diff --git a/Lib/test/test_warnings.py b/Lib/test/test_warnings.py
index 6889e3f..8206202 100644
--- a/Lib/test/test_warnings.py
+++ b/Lib/test/test_warnings.py
@@ -1,5 +1,7 @@
 import warnings
+import linecache
 import os
+from io import StringIO
 import sys
 import unittest
 from test import test_support
@@ -36,6 +38,8 @@
                     self.assert_(w.category is category)
 
     def test_filtering(self):
+        # Test filterwarnings().
+        # Implicitly also tests resetwarnings().
         with test_support.catch_warning() as w:
             warnings.filterwarnings("error", "", Warning, "", 0)
             self.assertRaises(UserWarning, warnings.warn, 'convert to error')
@@ -97,6 +101,33 @@
             self.assertEqual(os.path.basename(w.filename), "sys")
 
 
+class WarningsDisplayTests(unittest.TestCase):
+
+    def test_formatwarning(self):
+        message = "msg"
+        category = Warning
+        file_name = os.path.splitext(warning_tests.__file__)[0] + '.py'
+        line_num = 3
+        file_line = linecache.getline(file_name, line_num).strip()
+        expect = "%s:%s: %s: %s\n  %s\n" % (file_name, line_num, category.__name__,
+                                         message, file_line)
+        self.failUnlessEqual(warnings.formatwarning(message, category,
+                                                    file_name, line_num),
+                             expect)
+
+    def test_showwarning(self):
+        file_name = os.path.splitext(warning_tests.__file__)[0] + '.py'
+        line_num = 3
+        expected_file_line = linecache.getline(file_name, line_num).strip()
+        message = 'msg'
+        category = Warning
+        file_object = StringIO()
+        expect = warnings.formatwarning(message, category, file_name, line_num)
+        warnings.showwarning(message, category, file_name, line_num,
+                                file_object)
+        self.failUnlessEqual(file_object.getvalue(), expect)
+
+
 def test_main(verbose=None):
     # Obscure hack so that this test passes after reloads or repeated calls
     # to test_main (regrtest -R).
@@ -106,7 +137,7 @@
         del warning_tests.__warningregistry__
     if hasattr(sys, '__warningregistry__'):
         del sys.__warningregistry__
-    test_support.run_unittest(TestModule)
+    test_support.run_unittest(TestModule, WarningsDisplayTests)
 
 if __name__ == "__main__":
     test_main(verbose=True)
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index 76c8198..fbb7b4f 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -12,6 +12,8 @@
 
 #include <signal.h>
 
+#include <sys/stat.h>
+
 #ifndef SIG_ERR
 #define SIG_ERR ((PyOS_sighandler_t)(-1))
 #endif
@@ -75,6 +77,8 @@
         PyObject *func;
 } Handlers[NSIG];
 
+static sig_atomic_t wakeup_fd = -1;
+
 /* Speed up sigcheck() when none tripped */
 static volatile sig_atomic_t is_tripped = 0;
 
@@ -128,6 +132,8 @@
                    cleared in PyErr_CheckSignals() before .tripped. */
 		is_tripped = 1;
 		Py_AddPendingCall(checksignals_witharg, NULL);
+		if (wakeup_fd != -1)
+			write(wakeup_fd, "\0", 1);
 #ifdef WITH_THREAD
 	}
 #endif
@@ -267,6 +273,50 @@
 anything else -- the callable Python object used as a handler");
 
 
+static PyObject *
+signal_set_wakeup_fd(PyObject *self, PyObject *args)
+{
+	struct stat buf;
+	int fd, old_fd;
+	if (!PyArg_ParseTuple(args, "i:set_wakeup_fd", &fd))
+		return NULL;
+#ifdef WITH_THREAD
+	if (PyThread_get_thread_ident() != main_thread) {
+		PyErr_SetString(PyExc_ValueError,
+				"set_wakeup_fd only works in main thread");
+		return NULL;
+	}
+#endif
+	if (fd != -1 && fstat(fd, &buf) != 0) {
+		PyErr_SetString(PyExc_ValueError, "invalid fd");
+		return NULL;
+	}
+	old_fd = wakeup_fd;
+	wakeup_fd = fd;
+	return PyLong_FromLong(old_fd);
+}
+
+PyDoc_STRVAR(set_wakeup_fd_doc,
+"set_wakeup_fd(fd) -> fd\n\
+\n\
+Sets the fd to be written to (with '\\0') when a signal\n\
+comes in.  A library can use this to wakeup select or poll.\n\
+The previous fd is returned.\n\
+\n\
+The fd must be non-blocking.");
+
+/* C API for the same, without all the error checking */
+int
+PySignal_SetWakeupFd(int fd)
+{
+	int old_fd = wakeup_fd;
+	if (fd < 0)
+		fd = -1;
+	wakeup_fd = fd;
+	return old_fd;
+}
+
+
 /* List of functions defined in the module */
 static PyMethodDef signal_methods[] = {
 #ifdef HAVE_ALARM
@@ -274,11 +324,12 @@
 #endif
 	{"signal",	        signal_signal, METH_VARARGS, signal_doc},
 	{"getsignal",	        signal_getsignal, METH_VARARGS, getsignal_doc},
+	{"set_wakeup_fd",	signal_set_wakeup_fd, METH_VARARGS, set_wakeup_fd_doc},
 #ifdef HAVE_PAUSE
 	{"pause",	        (PyCFunction)signal_pause,
 	 METH_NOARGS,pause_doc},
 #endif
-	{"default_int_handler", signal_default_int_handler, 
+	{"default_int_handler", signal_default_int_handler,
 	 METH_VARARGS, default_int_handler_doc},
 	{NULL,			NULL}		/* sentinel */
 };
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 3e2f2a1..98285b9 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -184,13 +184,19 @@
 builtin_all(PyObject *self, PyObject *v)
 {
 	PyObject *it, *item;
+	PyObject *(*iternext)(PyObject *);
+	int cmp;
 
 	it = PyObject_GetIter(v);
 	if (it == NULL)
 		return NULL;
+	iternext = *Py_TYPE(it)->tp_iternext;
 
-	while ((item = PyIter_Next(it)) != NULL) {
-		int cmp = PyObject_IsTrue(item);
+	for (;;) {
+		item = iternext(it);
+		if (item == NULL)
+			break;
+		cmp = PyObject_IsTrue(item);
 		Py_DECREF(item);
 		if (cmp < 0) {
 			Py_DECREF(it);
@@ -202,8 +208,12 @@
 		}
 	}
 	Py_DECREF(it);
-	if (PyErr_Occurred())
-		return NULL;
+	if (PyErr_Occurred()) {
+		if (PyErr_ExceptionMatches(PyExc_StopIteration))
+			PyErr_Clear();
+		else
+			return NULL;
+	}
 	Py_RETURN_TRUE;
 }
 
@@ -216,13 +226,19 @@
 builtin_any(PyObject *self, PyObject *v)
 {
 	PyObject *it, *item;
+	PyObject *(*iternext)(PyObject *);
+	int cmp;
 
 	it = PyObject_GetIter(v);
 	if (it == NULL)
 		return NULL;
+	iternext = *Py_TYPE(it)->tp_iternext;
 
-	while ((item = PyIter_Next(it)) != NULL) {
-		int cmp = PyObject_IsTrue(item);
+	for (;;) {
+		item = iternext(it);
+		if (item == NULL)
+			break;
+		cmp = PyObject_IsTrue(item);
 		Py_DECREF(item);
 		if (cmp < 0) {
 			Py_DECREF(it);
@@ -234,8 +250,12 @@
 		}
 	}
 	Py_DECREF(it);
-	if (PyErr_Occurred())
-		return NULL;
+	if (PyErr_Occurred()) {
+		if (PyErr_ExceptionMatches(PyExc_StopIteration))
+			PyErr_Clear();
+		else
+			return NULL;
+	}
 	Py_RETURN_FALSE;
 }
 
diff --git a/Python/compile.c b/Python/compile.c
index c3ef67a..e1f2a55 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -3172,7 +3172,7 @@
 		return compiler_ifexp(c, e);
 	case Dict_kind:
 		n = asdl_seq_LEN(e->v.Dict.values);
-		ADDOP_I(c, BUILD_MAP, (n>255 ? 255 : n));
+		ADDOP_I(c, BUILD_MAP, (n>0xFFFF ? 0xFFFF : n));
 		for (i = 0; i < n; i++) {
 			VISIT(c, expr, 
 				(expr_ty)asdl_seq_GET(e->v.Dict.values, i));
@@ -3648,10 +3648,10 @@
 instrsize(struct instr *instr)
 {
 	if (!instr->i_hasarg)
-		return 1;
+		return 1;	/* 1 byte for the opcode*/
 	if (instr->i_oparg > 0xffff)
-		return 6;
-	return 3;
+		return 6;	/* 1 (opcode) + 1 (EXTENDED_ARG opcode) + 2 (oparg) + 2(oparg extended) */
+	return 3; 		/* 1 (opcode) + 2 (oparg) */
 }
 
 static int