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-rw-r--r--Modules/_json.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/Modules/_json.c b/Modules/_json.c
index 8000f915f3..f63d758348 100644
--- a/Modules/_json.c
+++ b/Modules/_json.c
@@ -1344,11 +1344,19 @@ encoder_init(PyObject *self, PyObject *args, PyObject *kwds)
assert(PyEncoder_Check(self));
s = (PyEncoderObject *)self;
- if (!PyArg_ParseTupleAndKeywords(args, kwds, "OOOOOOOOp:make_encoder", kwlist,
- &markers, &defaultfn, &encoder, &indent, &key_separator, &item_separator,
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "OOOOUUOOp:make_encoder", kwlist,
+ &markers, &defaultfn, &encoder, &indent,
+ &key_separator, &item_separator,
&sort_keys, &skipkeys, &allow_nan))
return -1;
+ if (markers != Py_None && !PyDict_Check(markers)) {
+ PyErr_Format(PyExc_TypeError,
+ "make_encoder() argument 1 must be dict or None, "
+ "not %.200s", Py_TYPE(markers)->tp_name);
+ return -1;
+ }
+
s->markers = markers;
s->defaultfn = defaultfn;
s->encoder = encoder;