1 files changed, 16 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-5754.rs b/src/test/ui/issues/issue-5754.rs
new file mode 100644
index 000000000..d90816635
--- /dev/null
+++ b/src/test/ui/issues/issue-5754.rs
@@ -0,0 +1,16 @@
+// build-pass
+#![allow(dead_code)]
+#![allow(improper_ctypes)]
+
+// pretty-expanded FIXME #23616
+
+struct TwoDoubles {
+    r: f64,
+    i: f64
+}
+
+extern "C" {
+    fn rust_dbg_extern_identity_TwoDoubles(arg1: TwoDoubles) -> TwoDoubles;
+}
+
+pub fn main() {}