Forward-port of r52136,52138: a review of overflow-detecting code.

* unified the way intobject, longobject and mystrtoul handle
  values around -sys.maxint-1.

* in general, trying to entierely avoid overflows in any computation
  involving signed ints or longs is extremely involved.  Fixed a few
  simple cases where a compiler might be too clever (but that's all
  guesswork).

* more overflow checks against bad data in marshal.c.

* 2.5 specific: fixed a number of places that were still confusing int
  and Py_ssize_t.  Some of them could potentially have caused
  "real-world" breakage.

* list.pop(x): fixing overflow issues on x was messy.  I just reverted
  to PyArg_ParseTuple("n"), which does the right thing.  (An obscure
  test was trying to give a Decimal to list.pop()... doesn't make
  sense any more IMHO)

* trying to write a few tests...

1 files changed, 8 insertions, 2 deletions

diff --git a/Misc/NEWS b/Misc/NEWS
index 2fb0793..c7d553e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,8 +12,14 @@ What's New in Python 2.6 alpha 1?
 Core and builtins
 -----------------
 
-- Integer negation and absolute value were fixed to not rely
-  on undefined behaviour of the C compiler anymore.
+- list.pop(x) accepts any object x following the __index__ protocol.
+
+- Fix some leftovers from the conversion from int to Py_ssize_t
+  (relevant to strings and sequences of more than 2**31 items).
+
+- A number of places, including integer negation and absolute value,
+  were fixed to not rely on undefined behaviour of the C compiler
+  anymore.
 
 - Bug #1566800: make sure that EnvironmentError can be called with any
   number of arguments, as was the case in Python 2.4.