1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/lint/warn-ctypes-inhibit.rs b/src/test/ui/lint/warn-ctypes-inhibit.rs
new file mode 100644
index 000000000..15d8b09d2
--- /dev/null
+++ b/src/test/ui/lint/warn-ctypes-inhibit.rs
@@ -0,0 +1,15 @@
+// run-pass
+
+#![allow(dead_code)]
+// compile-flags:-D improper-ctypes
+
+// pretty-expanded FIXME #23616
+#![allow(improper_ctypes)]
+
+mod libc {
+    extern "C" {
+        pub fn malloc(size: isize) -> *const u8;
+    }
+}
+
+pub fn main() {}