1 files changed, 18 insertions, 0 deletions
diff --git a/test/std/utilities/date.time/asctime.thread-unsafe.fail.cpp b/test/std/utilities/date.time/asctime.thread-unsafe.fail.cpp
new file mode 100644
index 000000000000..3a9749e21c52
--- /dev/null
+++ b/test/std/utilities/date.time/asctime.thread-unsafe.fail.cpp
@@ -0,0 +1,18 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: libcpp-has-no-thread-unsafe-c-functions
+
+#include <ctime>
+
+int main() {
+    // asctime is not thread-safe.
+    std::time_t t = 0;
+    std::asctime(&t);
+}