pythongh-99925: Fix inconsistency in json.dumps() error messages

fnesveda · Dec 1, 2022 · 94f9f59 · 94f9f59
1 parent 0563be2
commit 94f9f59
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/Misc/NEWS.d/next/Library/2022-12-01-15-26-42.gh-issue-99925.vXya8e.rst b/Misc/NEWS.d/next/Library/2022-12-01-15-26-42.gh-issue-99925.vXya8e.rst
@@ -0,0 +1,2 @@
+Unify error messages in :meth:`json.dumps(float('nan'), allow_nan=False)`
+between `indent=None` and `indent=<SOMETHING>`
diff --git a/Modules/_json.c b/Modules/_json.c
@@ -1319,9 +1319,10 @@ encoder_encode_float(PyEncoderObject *s, PyObject *obj)
     double i = PyFloat_AS_DOUBLE(obj);
     if (!Py_IS_FINITE(i)) {
         if (!s->allow_nan) {
-            PyErr_SetString(
+            PyErr_Format(
                     PyExc_ValueError,
-                    "Out of range float values are not JSON compliant"
+                    "Out of range float values are not JSON compliant: %s",
+                    PyOS_double_to_string(i, 'r', 0, 0, NULL)
                     );
             return NULL;
         }