commit c7d93b761413834e0ac39f5fc648565a2843121f
author Mark Dickinson <mdickinson@enthought.com> Sun Sep 25 15:34:32 2011 +0100
committer Mark Dickinson <mdickinson@enthought.com> Sun Sep 25 15:34:32 2011 +0100
tree 0bcb66dfcb476fb49a59ce019943f293f003dbc0
parent 50203a69b344e80be5000fe87aafad09e84cde85

Issue #1621: Fix undefined behaviour from signed overflow in datetime module hashes, array and list iterations, and get_integer (stringlib/string_format.h)

Modules/arraymodule.c

diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index 5748a3c..8806bd5 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -2351,7 +2351,7 @@
                 self->ob_item + (cur + 1) * itemsize,
                 lim * itemsize);
         }
-        cur = start + slicelength * step;
+        cur = start + (size_t)slicelength * step;
         if (cur < (size_t)Py_SIZE(self)) {
             memmove(self->ob_item + (cur-slicelength) * itemsize,
                 self->ob_item + cur * itemsize,