3 files changed, 68 insertions, 0 deletions
diff --git a/tests/mir-opt/elaborate_box_deref_in_debuginfo.pointee.ElaborateBoxDerefs.diff b/tests/mir-opt/elaborate_box_deref_in_debuginfo.pointee.ElaborateBoxDerefs.diff
new file mode 100644
index 00000000000..279c1a1990d
--- /dev/null
+++ b/tests/mir-opt/elaborate_box_deref_in_debuginfo.pointee.ElaborateBoxDerefs.diff
@@ -0,0 +1,13 @@
+- // MIR for `pointee` before ElaborateBoxDerefs
++ // MIR for `pointee` after ElaborateBoxDerefs
+  
+  fn pointee(_1: Box<i32>) -> () {
+-     debug foo => (*_1);
++     debug foo => (*(((_1.0: std::ptr::Unique<i32>).0: std::ptr::NonNull<i32>).0: *const i32));
+      let mut _0: ();
+  
+      bb0: {
+          return;
+      }
+  }
+  
diff --git a/tests/mir-opt/elaborate_box_deref_in_debuginfo.rs b/tests/mir-opt/elaborate_box_deref_in_debuginfo.rs
new file mode 100644
index 00000000000..0046e7104f1
--- /dev/null
+++ b/tests/mir-opt/elaborate_box_deref_in_debuginfo.rs
@@ -0,0 +1,20 @@
+// skip-filecheck
+//@ test-mir-pass: ElaborateBoxDerefs
+
+#![feature(custom_mir, core_intrinsics)]
+
+extern crate core;
+use core::intrinsics::mir::*;
+
+// EMIT_MIR elaborate_box_deref_in_debuginfo.pointee.ElaborateBoxDerefs.diff
+#[custom_mir(dialect = "built")]
+fn pointee(opt: Box<i32>) {
+    mir!(
+        debug foo => *opt;
+        {
+            Return()
+        }
+    )
+}
+
+fn main() {}
diff --git a/tests/ui/async-await/async-closures/box-deref-in-debuginfo.rs b/tests/ui/async-await/async-closures/box-deref-in-debuginfo.rs
new file mode 100644
index 00000000000..8b2de578b24
--- /dev/null
+++ b/tests/ui/async-await/async-closures/box-deref-in-debuginfo.rs
@@ -0,0 +1,35 @@
+//@ aux-build:block-on.rs
+//@ edition:2021
+//@ run-pass
+
+#![feature(async_closure)]
+
+extern crate block_on;
+
+pub trait Trait {
+    fn callback(&mut self);
+}
+impl Trait for (i32,) {
+    fn callback(&mut self) {
+        println!("hi {}", self.0);
+        self.0 += 1;
+    }
+}
+
+async fn call_once(f: impl async FnOnce()) {
+    f().await;
+}
+
+async fn run(mut loader: Box<dyn Trait>) {
+    let f = async move || {
+        loader.callback();
+        loader.callback();
+    };
+    call_once(f).await;
+}
+
+fn main() {
+    block_on::block_on(async {
+        run(Box::new((42,))).await;
+    });
+}