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bpo-32500: Fix error messages for sequence and mapping C API. (GH-7846) 

Fix error messages for PySequence_Size(), PySequence_GetItem(),
PySequence_SetItem() and PySequence_DelItem() called with a mapping
and PyMapping_Size() called with a sequence.
This commit is contained in:
Serhiy Storchaka 2018-07-23 23:43:42 +03:00 committed by GitHub
parent aba24ff360
commit a6fdddb7df
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2 changed files with 24 additions and 0 deletions
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4
Misc/NEWS.d/next/C API/2018-06-21-17-19-31.bpo-32500.WGCNad.rst Normal file
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@ -0,0 +1,4 @@
Fixed error messages for :c:func:`PySequence_Size`,
:c:func:`PySequence_GetItem`, :c:func:`PySequence_SetItem` and
:c:func:`PySequence_DelItem` called with a mapping and
:c:func:`PyMapping_Size` called with a sequence.

20
Objects/abstract.c
View File

@ -1531,6 +1531,10 @@ PySequence_Size(PyObject *s)
return len; return len;
} }
if (s->ob_type->tp_as_mapping && s->ob_type->tp_as_mapping->mp_length) {
type_error("%.200s is not a sequence", s);
return -1;
}
type_error("object of type '%.200s' has no len()", s); type_error("object of type '%.200s' has no len()", s);
return -1; return -1;
} }
@ -1677,6 +1681,9 @@ PySequence_GetItem(PyObject *s, Py_ssize_t i)
return m->sq_item(s, i); return m->sq_item(s, i);
} }
if (s->ob_type->tp_as_mapping && s->ob_type->tp_as_mapping->mp_subscript) {
return type_error("%.200s is not a sequence", s);
}
return type_error("'%.200s' object does not support indexing", s); return type_error("'%.200s' object does not support indexing", s);
} }
@ -1728,6 +1735,10 @@ PySequence_SetItem(PyObject *s, Py_ssize_t i, PyObject *o)
return m->sq_ass_item(s, i, o); return m->sq_ass_item(s, i, o);
} }
if (s->ob_type->tp_as_mapping && s->ob_type->tp_as_mapping->mp_ass_subscript) {
type_error("%.200s is not a sequence", s);
return -1;
}
type_error("'%.200s' object does not support item assignment", s); type_error("'%.200s' object does not support item assignment", s);
return -1; return -1;
} }
@ -1757,6 +1768,10 @@ PySequence_DelItem(PyObject *s, Py_ssize_t i)
return m->sq_ass_item(s, i, (PyObject *)NULL); return m->sq_ass_item(s, i, (PyObject *)NULL);
} }
if (s->ob_type->tp_as_mapping && s->ob_type->tp_as_mapping->mp_ass_subscript) {
type_error("%.200s is not a sequence", s);
return -1;
}
type_error("'%.200s' object doesn't support item deletion", s); type_error("'%.200s' object doesn't support item deletion", s);
return -1; return -1;
} }
@ -2093,6 +2108,11 @@ PyMapping_Size(PyObject *o)
return len; return len;
} }
if (o->ob_type->tp_as_sequence && o->ob_type->tp_as_sequence->sq_length) {
type_error("%.200s is not a mapping", o);
return -1;
}
/* PyMapping_Size() can be called from PyObject_Size(). */
type_error("object of type '%.200s' has no len()", o); type_error("object of type '%.200s' has no len()", o);
return -1; return -1;
} }