1 files changed, 15 insertions, 0 deletions

diff --git a/tests/test_mbstowcs_dynamic.c b/tests/test_mbstowcs_dynamic.c
new file mode 100644
index 0000000..81db020
--- /dev/null
+++ b/tests/test_mbstowcs_dynamic.c
@@ -0,0 +1,15 @@
+#include "common.h"
+
+#include <wchar.h>
+
+int main(int argc, char** argv) {
+  const char* mbstr = "z\u00df\u6c34\U0001f34c"; // or u8"zß水🍌"
+  wchar_t wstr[5];
+  mbstowcs(wstr, mbstr, 4);
+
+  CHK_FAIL_START
+  mbstowcs(wstr, mbstr, argc);
+  CHK_FAIL_END
+
+  return ret;
+}