diff options
Diffstat (limited to 'Modules/arraymodule.c')
| -rw-r--r-- | Modules/arraymodule.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c index 256bcd8..1dbe918 100644 --- a/Modules/arraymodule.c +++ b/Modules/arraymodule.c @@ -810,8 +810,8 @@ array_iter_extend(arrayobject *self, PyObject *bb) static int array_do_extend(arrayobject *self, PyObject *bb) { - Py_ssize_t size, oldsize; - + Py_ssize_t size, oldsize, bbsize; + if (!array_Check(bb)) return array_iter_extend(self, bb); #define b ((arrayobject *)bb) @@ -826,11 +826,13 @@ array_do_extend(arrayobject *self, PyObject *bb) return -1; } oldsize = Py_SIZE(self); + /* Get the size of bb before resizing the array since bb could be self. */ + bbsize = Py_SIZE(bb); size = oldsize + Py_SIZE(b); if (array_resize(self, size) == -1) return -1; memcpy(self->ob_item + oldsize * self->ob_descr->itemsize, - b->ob_item, Py_SIZE(b) * b->ob_descr->itemsize); + b->ob_item, bbsize * b->ob_descr->itemsize); return 0; #undef b |