1 files changed, 39 insertions, 0 deletions
diff --git a/tests/ui/lint/issue-14309.rs b/tests/ui/lint/issue-14309.rs
new file mode 100644
index 00000000000..328a4c982b8
--- /dev/null
+++ b/tests/ui/lint/issue-14309.rs
@@ -0,0 +1,39 @@
+#![deny(improper_ctypes)]
+#![allow(dead_code)]
+
+struct A {
+    x: i32
+}
+
+#[repr(C, packed)]
+struct B {
+    x: i32,
+    y: A
+}
+
+#[repr(C)]
+struct C {
+    x: i32
+}
+
+type A2 = A;
+type B2 = B;
+type C2 = C;
+
+#[repr(C)]
+struct D {
+    x: C,
+    y: A
+}
+
+extern "C" {
+    fn foo(x: A); //~ ERROR type `A`, which is not FFI-safe
+    fn bar(x: B); //~ ERROR type `A`
+    fn baz(x: C);
+    fn qux(x: A2); //~ ERROR type `A`
+    fn quux(x: B2); //~ ERROR type `A`
+    fn corge(x: C2);
+    fn fred(x: D); //~ ERROR type `A`
+}
+
+fn main() { }