Apr 29, 2025 · Apr 29, 2025 · Apr 29, 2025
diff --git a/numpy/_core/src/multiarray/stringdtype/dtype.c b/numpy/_core/src/multiarray/stringdtype/dtype.c
 stringdtype_finalize_descr(PyArray_Descr *dtype)
 {
    PyArray_StringDTypeObject *sdtype = (PyArray_StringDTypeObject *)dtype;
    // acquire the allocator lock in case the descriptor we want to finalize
    // is shared between threads, see gh-28813
    npy_string_allocator *allocator = NpyString_acquire_allocator(sdtype);
    if (sdtype->array_owned == 0) {
        sdtype->array_owned = 1;
        NpyString_release_allocator(allocator);
        Py_INCREF(dtype);
        return dtype;
    }
    NpyString_release_allocator(allocator);
    PyArray_StringDTypeObject *ret = (PyArray_StringDTypeObject *)new_stringdtype_instance(
            sdtype->na_object, sdtype->coerce);
    ret->array_owned = 1;
        return -1;
    }

 PyArray_Descr *singleton =
            NPY_DT_CALL_default_descr(&PyArray_StringDType);
 PyArray_StringDTypeObject *singleton =
 (PyArray_StringDTypeObject *)NPY_DT_CALL_default_descr(&PyArray_StringDType);

    if (singleton == NULL) {
        return -1;
    }

    PyArray_StringDType.singleton = singleton;
    // never associate the singleton with an array
    singleton->array_owned = 1;

    PyArray_StringDType.singleton = (PyArray_Descr *)singleton;
    PyArray_StringDType.type_num = NPY_VSTRING;

    for (int i = 0; PyArray_StringDType_casts[i] != NULL; i++) {
Original file line number	Diff line number	Diff line change
Expand Up		@@ -633,11 +633,16 @@ PyArray_Descr *
		stringdtype_finalize_descr(PyArray_Descr *dtype)
		{
		PyArray_StringDTypeObject sdtype = (PyArray_StringDTypeObject )dtype;
		// acquire the allocator lock in case the descriptor we want to finalize
		// is shared between threads, see gh-28813
		npy_string_allocator *allocator = NpyString_acquire_allocator(sdtype);
		if (sdtype->array_owned == 0) {
		sdtype->array_owned = 1;
		NpyString_release_allocator(allocator);
		Py_INCREF(dtype);
		return dtype;
		}
		NpyString_release_allocator(allocator);
		PyArray_StringDTypeObject ret = (PyArray_StringDTypeObject )new_stringdtype_instance(
		sdtype->na_object, sdtype->coerce);
		ret->array_owned = 1;
Expand DownExpand Up		@@ -852,14 +857,17 @@ init_string_dtype(void)
		return -1;
		}

		PyArray_Descr *singleton =
		NPY_DT_CALL_default_descr(&PyArray_StringDType);
		PyArray_StringDTypeObject *singleton =
		(PyArray_StringDTypeObject *)NPY_DT_CALL_default_descr(&PyArray_StringDType);

		if (singleton == NULL) {
		return -1;
		}

		PyArray_StringDType.singleton = singleton;
		// never associate the singleton with an array
		singleton->array_owned = 1;

		PyArray_StringDType.singleton = (PyArray_Descr *)singleton;
		PyArray_StringDType.type_num = NPY_VSTRING;

		for (int i = 0; PyArray_StringDType_casts[i] != NULL; i++) {
Expand Down