--- /dev/null
+++ xnu/xnu-10063.141.1/tests/safe_allocation_src/ctor.nullptr.cpp
@@ -0,0 +1,49 @@
+//
+// Tests for
+//  safe_allocation(std::nullptr_t);
+//
+
+#include <libkern/c++/safe_allocation.h>
+#include <darwintest.h>
+#include "test_utils.h"
+
+struct T {
+	int i;
+};
+
+template <typename T>
+static void
+tests()
+{
+	{
+		test_safe_allocation<T> array(nullptr);
+		CHECK(array.data() == nullptr);
+		CHECK(array.size() == 0);
+		CHECK(array.begin() == array.end());
+	}
+	{
+		test_safe_allocation<T> array{nullptr};
+		CHECK(array.data() == nullptr);
+		CHECK(array.size() == 0);
+		CHECK(array.begin() == array.end());
+	}
+	{
+		test_safe_allocation<T> array = nullptr;
+		CHECK(array.data() == nullptr);
+		CHECK(array.size() == 0);
+		CHECK(array.begin() == array.end());
+	}
+	{
+		auto f = [](test_safe_allocation<T> array) {
+			    CHECK(array.data() == nullptr);
+			    CHECK(array.size() == 0);
+			    CHECK(array.begin() == array.end());
+		    };
+		f(nullptr);
+	}
+}
+
+T_DECL(ctor_nullptr, "safe_allocation.ctor.nullptr") {
+	tests<T>();
+	tests<T const>();
+}