Merged revisions 79866-79867 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r79866 | benjamin.peterson | 2010-04-06 16:37:06 -0500 (Tue, 06 Apr 2010) | 1 line

  use skip decorator
........
  r79867 | benjamin.peterson | 2010-04-06 16:50:00 -0500 (Tue, 06 Apr 2010) | 1 line

  remove a optimization that resulted in unexpected behavior #8929
........

diff --git a/Lib/test/test_select.py b/Lib/test/test_select.py
index a463868f6278d49eddbacb957d79b74426e65ddb..8813c6ed1b16b5bc0ffa49a97d77cb18d4bfdd70 100644 (file)
--- a/Lib/test/test_select.py
+++ b/Lib/test/test_select.py
@@ -4,6 +4,8 @@ import select
 import os
 import sys
 
+@unittest.skipIf(sys.platform[:3] in ('win', 'mac', 'os2', 'riscos'),
+                 "can't easily test on this system")
 class SelectTestCase(unittest.TestCase):
 
     class Nope:
@@ -19,11 +21,14 @@ class SelectTestCase(unittest.TestCase):
         self.assertRaises(TypeError, select.select, [self.Almost()], [], [])
         self.assertRaises(TypeError, select.select, [], [], [], "not a number")
 
+    def test_returned_list_identity(self):
+        # See issue #8329
+        r, w, x = select.select([], [], [], 1)
+        self.assertIsNot(r, w)
+        self.assertIsNot(r, x)
+        self.assertIsNot(w, x)
+
     def test_select(self):
-        if sys.platform[:3] in ('win', 'mac', 'os2', 'riscos'):
-            if support.verbose:
-                print("Can't test select easily on", sys.platform)
-            return
         cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'
         p = os.popen(cmd, 'r')
         for tout in (0, 1, 2, 4, 8, 16) + (None,)*10:

diff --git a/Misc/NEWS b/Misc/NEWS
index d8dc4d6e8b922f7a0c48eb158e9cd93a304ec9b4..8de7403602a2536deed45cf836de7a6ca4c37c16 100644 (file)
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@ What's New in Python 3.2 Alpha 1?
 Core and Builtins
 -----------------
 
+- Issue #8329: Don't return the same lists from select.select when no fds are
+  changed.
+
 - Issue #8259: 1L << (2**31) no longer produces an 'outrageous shift error'
   on 64-bit machines.  The shift count for either left or right shift is
   permitted to be up to sys.maxsize.

diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
index c13bab91fc3e938ea20d0267d974e24125cc29bb..1c021ba61b678745d90c1b05f9107a4e81a131e9 100644 (file)
--- a/Modules/selectmodule.c
+++ b/Modules/selectmodule.c
@@ -284,14 +284,6 @@ select_select(PyObject *self, PyObject *args)
                PyErr_SetFromErrno(SelectError);
        }
 #endif
-       else if (n == 0) {
-                /* optimization */
-               ifdlist = PyList_New(0);
-               if (ifdlist) {
-                       ret = PyTuple_Pack(3, ifdlist, ifdlist, ifdlist);
-                       Py_DECREF(ifdlist);
-               }
-       }
        else {
                /* any of these three calls can raise an exception.  it's more
                   convenient to test for this after all three calls... but