Merged revisions 87968,87971-87975 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r87968 | antoine.pitrou | 2011-01-12 21:46:37 +0100 (mer., 12 janv. 2011) | 4 lines

  Fix the expected memory use of utf-8 encoding.  Also, release the
  one reference to a huge object even when an exception is raised.
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  r87971 | antoine.pitrou | 2011-01-12 22:19:59 +0100 (mer., 12 janv. 2011) | 3 lines

  Make test skipping message nicer, and remove the rather useless "overhead" parameter.
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  r87972 | antoine.pitrou | 2011-01-12 22:40:20 +0100 (mer., 12 janv. 2011) | 3 lines

  Fix @bigmemtest when no limit is given by the user (oops)
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  r87973 | antoine.pitrou | 2011-01-12 22:50:44 +0100 (mer., 12 janv. 2011) | 3 lines

  More informative skip message in @bigaddrspace
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  r87974 | antoine.pitrou | 2011-01-12 22:58:39 +0100 (mer., 12 janv. 2011) | 3 lines

  A better message again
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  r87975 | antoine.pitrou | 2011-01-12 23:02:45 +0100 (mer., 12 janv. 2011) | 3 lines

  Fix test_bigaddrspace (some tests didn't trigger the expected MemoryError)
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diff --git a/Lib/test/test_bigmem.py b/Lib/test/test_bigmem.py
index 7def22b..aec3778 100644
--- a/Lib/test/test_bigmem.py
+++ b/Lib/test/test_bigmem.py
@@ -564,8 +564,11 @@
         if expectedsize is None:
             expectedsize = size
 
-        s = c * size
-        self.assertEqual(len(s.encode(enc)), expectedsize)
+        try:
+            s = c * size
+            self.assertEqual(len(s.encode(enc)), expectedsize)
+        finally:
+            s = None
 
     def setUp(self):
         # HACK: adjust memory use of tests inherited from BaseStrTest
@@ -586,7 +589,8 @@
         for name, memuse in self._adjusted.items():
             getattr(type(self), name).memuse = memuse
 
-    @bigmemtest(minsize=_2G + 2, memuse=character_size + 1)
+    # the utf8 encoder preallocates big time (4x the number of characters)
+    @bigmemtest(minsize=_2G + 2, memuse=character_size + 4)
     def test_encode(self, size):
         return self.basic_encode_test(size, 'utf-8')