test for Box<T, &A> LTO issue

src/test/ui/lto/auxiliary/lto-box-allocator.rs

@@ -0,0 +1,22 @@
+// no-prefer-dynamic
+
+#![crate_type = "rlib"]
+
+#![feature(allocator_api)]
+#![feature(bench_black_box)]
+use std::alloc::Global;
+use std::hint::black_box;
+
+pub fn f() {
+    let mut node = Box::new_in(Node {
+        v: &(),
+        b: false,
+    }, &Global);
+    node.b = true;
+    black_box(node);
+}
+
+struct Node {
+    v: &'static (),
+    b: bool,
+}

src/test/ui/lto/lto-box-allocator.rs

@@ -0,0 +1,9 @@
+// run-pass
+// aux-build:lto-box-allocator.rs
+// compile-flags: -C lto=thin
+// no-prefer-dynamic
+extern crate lto_box_allocator;
+
+fn main() {
+    lto_box_allocator::f();
+}