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Fix assignment of a list to a slice of itself.

This commit is contained in:
Guido van Rossum 1991-12-24 13:27:34 +00:00
parent 4135e78204
commit 32dffaa016
1 changed files with 10 additions and 1 deletions
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11
Objects/listobject.c
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@ -357,8 +357,17 @@ list_ass_slice(a, ilow, ihigh, v)
#define b ((listobject *)v)
if (v == NULL)
n = 0;
else if (is_listobject(v))
else if (is_listobject(v)) {
n = b->ob_size;
if (a == b) {
/* Special case "a[i:j] = a" -- copy b first */
int ret;
v = list_slice(b, 0, n);
ret = list_ass_slice(a, ilow, ihigh, v);
DECREF(v);
return ret;
}
}
else {
err_badarg();
return -1;