1 files changed, 29 insertions, 0 deletions
diff --git a/lib/ccan/tcon/test/compile_fail-tcon_cast.c b/lib/ccan/tcon/test/compile_fail-tcon_cast.c
new file mode 100644
index 0000000000..f80ef42c09
--- /dev/null
+++ b/lib/ccan/tcon/test/compile_fail-tcon_cast.c
@@ -0,0 +1,29 @@
+#include <ccan/tcon/tcon.h>
+#include <stdlib.h>
+
+struct container {
+	void *p;
+};
+
+struct int_and_charp_container {
+	struct container raw;
+	TCON(int *tc1; char *tc2);
+};
+
+int main(int argc, char *argv[])
+{
+	struct int_and_charp_container icon;
+#ifdef FAIL
+#if !HAVE_TYPEOF
+#error We cannot detect type problems without HAVE_TYPEOF
+#endif
+	char *
+#else
+	int *
+#endif
+		x;
+
+	icon.raw.p = NULL;
+	x = tcon_cast(&icon, tc1, icon.raw.p);
+	return 0;
+}