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Merge #12973 itertools fix.

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Mark Dickinson 2011-09-24 08:57:00 +01:00
commit a61b053e61
2 changed files with 6 additions and 4 deletions
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4
Modules/itertoolsmodule.c
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@ -1234,7 +1234,9 @@ islice_next(isliceobject *lz)
return NULL;
lz->cnt++;
oldnext = lz->next;
lz->next += lz->step;
/* The (size_t) cast below avoids the danger of undefined
behaviour from signed integer overflow. */
lz->next += (size_t)lz->step;
if (lz->next < oldnext || (stop != -1 && lz->next > stop))
lz->next = stop;
return item;