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gh-81548: Deprecate octal escape sequences with value larger than 0o377 (GH-91668)

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Serhiy Storchaka 2022-04-30 13:16:27 +03:00 • committed by GitHub
parent a055dac0b4
commit 3483299a24
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8 changed files with 139 additions and 18 deletions
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29
Objects/unicodeobject.c
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@ -6404,6 +6404,12 @@ _PyUnicode_DecodeUnicodeEscapeInternal(const char *s,
ch = (ch<<3) + *s++ - '0';
}
}
if (ch > 0377) {
if (*first_invalid_escape == NULL) {
*first_invalid_escape = s-3; /* Back up 3 chars, since we've
already incremented s. */
}
}
WRITE_CHAR(ch);
continue;
@ -6554,11 +6560,24 @@ _PyUnicode_DecodeUnicodeEscapeStateful(const char *s,
if (result == NULL)
return NULL;
if (first_invalid_escape != NULL) {
if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
"invalid escape sequence '\\%c'",
(unsigned char)*first_invalid_escape) < 0) {
Py_DECREF(result);
return NULL;
unsigned char c = *first_invalid_escape;
if ('4' <= c && c <= '7') {
if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
"invalid octal escape sequence '\\%.3s'",
first_invalid_escape) < 0)
{
Py_DECREF(result);
return NULL;
}
}
else {
if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
"invalid escape sequence '\\%c'",
c) < 0)
{
Py_DECREF(result);
return NULL;
}
}
}
return result;