Apr 23, 2025 · Apr 22, 2025 · Apr 22, 2025 · Apr 22, 2025 · Apr 22, 2025 · Apr 22, 2025
diff --git a/Objects/unionobject.c b/Objects/unionobject.c
 union_init_parameters(unionobject *alias)
 {
    // Avoid the critical section if it's already initialized.
    if (alias->parameters != NULL) {
    if (FT_ATOMIC_LOAD_PTR_RELAXED(alias->parameters) != NULL) {
        return 0;
    }

    // Need to check again once we got the lock, another thread may have
    // initialized it while we were waiting for the lock.
    if (alias->parameters == NULL) {
        alias->parameters = _Py_make_parameters(alias->args);
        FT_ATOMIC_STORE_PTR(alias->parameters,
                            _Py_make_parameters(alias->args));
        if (alias->parameters == NULL) {
            result = -1;
        }
Original file line number	Diff line number	Diff line change
Expand Up		@@ -327,7 +327,7 @@ static int
		union_init_parameters(unionobject *alias)
		{
		// Avoid the critical section if it's already initialized.
		if (alias->parameters != NULL) {
		if (FT_ATOMIC_LOAD_PTR_RELAXED(alias->parameters) != NULL) {
		return 0;
		}

Expand All		@@ -336,7 +336,8 @@ union_init_parameters(unionobject *alias)
		// Need to check again once we got the lock, another thread may have
		// initialized it while we were waiting for the lock.
		if (alias->parameters == NULL) {
		alias->parameters = _Py_make_parameters(alias->args);
		FT_ATOMIC_STORE_PTR(alias->parameters,
		_Py_make_parameters(alias->args));
		if (alias->parameters == NULL) {
vstinner marked this conversation as resolved. Show resolvedHide resolved
		result = -1;
		}
Expand Down