BUG: fix reference counting error

numpy · charris · Feb 11, 2025 · Feb 6, 2025 · Feb 6, 2025 · Feb 6, 2025
commit f3c47ac9fe6a90cbc7cfabe1bf6743a271d08c02
diff --git a/numpy/_core/src/multiarray/convert_datatype.c b/numpy/_core/src/multiarray/convert_datatype.c
@@ -170,6 +170,7 @@ ensure_castingimpl_exists(PyArray_DTypeMeta *from, PyArray_DTypeMeta *to)
    if (from == to && res == Py_None) {
        PyErr_Format(PyExc_RuntimeError,
                "Internal NumPy error, within-DType cast missing for %S!", from);
+        Py_DECREF(res);
        return NULL;
    }
    return res;