Add some NULL-pointers checks

See:
- https://www.imperialviolet.org/2016/06/26/nonnull.html
- https://davidben.net/2024/01/15/empty-slices.html

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/test_memchr_null.c b/tests/test_memchr_null.c
new file mode 100644
index 0000000..02b994d
--- /dev/null
+++ b/tests/test_memchr_null.c
@@ -0,0 +1,13 @@
+#include "common.h"
+
+#include <string.h>
+
+int main(int argc, char** argv) {
+#ifndef __GNUC__
+  CHK_FAIL_START
+  memchr(NULL, (int)'A', 0);
+  CHK_FAIL_END
+#endif
+
+  return ret;
+}