- if (!uadd(&src_region_end, src_off, src_n))
- return PyErr_Format(PyExc_OverflowError, "(src_off + src_n) too large");
- if (src_region_end > src_size)
- return PyErr_Format(PyExc_OverflowError, "region runs off end of src");
-
- if (!INTEGRAL_ASSIGNMENT_FITS(&dest_size, dest.len))
- return PyErr_Format(PyExc_OverflowError, "invalid dest size");
- if (dest_off > dest_size)
- return PyErr_Format(PyExc_OverflowError, "region runs off end of dest");
+ unsigned long long dest_size;
+ if (!INTEGRAL_ASSIGNMENT_FITS(&dest_size, dest.len)) {
+ result = PyErr_Format(PyExc_OverflowError, "invalid dest size");
+ goto clean_and_return;
+ }
+ if (dest_off > dest_size) {
+ result = PyErr_Format(PyExc_OverflowError, "region runs off end of dest");
+ goto clean_and_return;
+ }