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| author | Victor Stinner <victor.stinner@haypocalc.com> | 2011-09-28 21:54:59 (GMT) |
|---|---|---|
| committer | Victor Stinner <victor.stinner@haypocalc.com> | 2011-09-28 21:54:59 (GMT) |
| commit | f5ca1a21a52882954de256909d13a8977d70a881 (patch) | |
| tree | e9d5f996daebc1bd52d044c0c49a2eff5927187b /Objects | |
| parent | 7c8c1ea3ecc9e83c6916d7548fb92ff5d018b2db (diff) | |
| download | cpython-f5ca1a21a52882954de256909d13a8977d70a881.zip cpython-f5ca1a21a52882954de256909d13a8977d70a881.tar.gz cpython-f5ca1a21a52882954de256909d13a8977d70a881.tar.bz2 | |
PyUnicode_CopyCharacters() fails if 'to' has more than 1 reference
Diffstat (limited to 'Objects')
| -rw-r--r-- | Objects/unicodeobject.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c index ae2dbf5..af05f4c 100644 --- a/Objects/unicodeobject.c +++ b/Objects/unicodeobject.c @@ -631,6 +631,14 @@ PyUnicode_CopyCharacters(PyObject *to, Py_ssize_t to_start, how_many, to_start, PyUnicode_GET_LENGTH(to)); return -1; } + if (how_many == 0) + return 0; + + if (Py_REFCNT(to) != 1) { + PyErr_SetString(PyExc_ValueError, + "Cannot modify a string having more than 1 reference"); + return -1; + } from_kind = PyUnicode_KIND(from); to_kind = PyUnicode_KIND(to); |