1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/box/unit/unique-ffi-symbols.rs b/tests/ui/box/unit/unique-ffi-symbols.rs
new file mode 100644
index 000000000..77b5ead26
--- /dev/null
+++ b/tests/ui/box/unit/unique-ffi-symbols.rs
@@ -0,0 +1,16 @@
+// run-pass
+// We used to have a __rust_abi shim that resulted in duplicated symbols
+// whenever the item path wasn't enough to disambiguate between them.
+fn main() {
+    let a = {
+        extern "C" fn good() -> i32 { return 0; }
+        good as extern "C" fn() -> i32
+    };
+    let b = {
+        extern "C" fn good() -> i32 { return 5; }
+        good as extern "C" fn() -> i32
+    };
+
+    assert!(a != b);
+    assert_eq!((a(), b()), (0, 5));
+}