1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/abi/cabi-int-widening.rs b/src/test/ui/abi/cabi-int-widening.rs
new file mode 100644
index 000000000..1dbab2752
--- /dev/null
+++ b/src/test/ui/abi/cabi-int-widening.rs
@@ -0,0 +1,15 @@
+// run-pass
+// ignore-wasm32-bare no libc to test ffi with
+
+#[link(name = "rust_test_helpers", kind = "static")]
+extern "C" {
+    fn rust_int8_to_int32(_: i8) -> i32;
+}
+
+fn main() {
+    let x = unsafe {
+        rust_int8_to_int32(-1)
+    };
+
+    assert!(x == -1);
+}