Currently failing test

src/test/cbmc/DynTrait/nested_boxed_closure.rs

@@ -0,0 +1,32 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+// Check that we can codegen various nesting structures of boxes and
+// pointer to closures.
+
+fn main() {
+    // Create a nested boxed once-callable closure
+    let f: Box<Box<dyn FnOnce(i32)>> = Box::new(Box::new(|x| assert!(x == 1)));
+    f(1);
+
+    // Create a pointer to a closure
+    let g = |y| assert!(y == 2);
+    let p: &dyn Fn(i32) = &g;
+    p(2);
+
+    // Additional level of pointer nesting
+    let q: &dyn Fn(i32) = &p;
+    q(2);
+
+    // Create a boxed pointer to a closure
+    let r: Box<&dyn Fn(i32)> = Box::new(&g);
+    r(2);
+
+    // Another boxed box
+    let s: Box<Box<dyn Fn(i32)>> = Box::new(Box::new(|x| assert!(x == 3)));
+    s(3);
+
+    // A pointer to the boxed box
+    let t: &Box<Box<dyn Fn(i32)>> = &s;
+    t(3);
+}