1 files changed, 12 insertions, 0 deletions
diff --git a/tests/ui/unsized-locals/rust-call.rs b/tests/ui/unsized-locals/rust-call.rs
new file mode 100644
index 000000000..ff4075aa4
--- /dev/null
+++ b/tests/ui/unsized-locals/rust-call.rs
@@ -0,0 +1,12 @@
+#![feature(unsized_tuple_coercion)]
+#![feature(unboxed_closures)]
+#![feature(unsized_fn_params)]
+
+fn bad() -> extern "rust-call" fn(([u8],)) { todo!() }
+
+fn main() {
+    let f = bad();
+    let slice: Box<([u8],)> = Box::new(([1; 8],));
+    f(*slice);
+    //~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
+}