--- /dev/null
+#include <stdio.h>
+
+#include <ccan/bytestring/bytestring.h>
+
+int main(int argc, char *argv[])
+{
+ struct bytestring bs;
+ const char *x = "abcde";
+
+#ifdef FAIL
+ bs = BYTESTRING(x);
+#endif
+ printf("%zd %s\n", bs.len, x);
+ return 0;
+}