9 files changed, 109 insertions, 1 deletions
diff --git a/tests/ui/async-await/async-drop/dependency-dropped.rs b/tests/ui/async-await/async-drop/dependency-dropped.rs
index f763bb32b17..d7f415e19aa 100644
--- a/tests/ui/async-await/async-drop/dependency-dropped.rs
+++ b/tests/ui/async-await/async-drop/dependency-dropped.rs
@@ -1,9 +1,12 @@
 //@ run-pass
 //@ check-run-results
+//@ revisions: with_feature without_feature
 //@ aux-build:async-drop-dep.rs
 //@ edition:2021
 
-#![feature(async_drop)]
+#![cfg_attr(with_feature, feature(async_drop))]
+//[without_feature]~^ WARN found async drop types in dependency `async_drop_dep`, but async_drop feature is disabled for `dependency_dropped`
+
 #![allow(incomplete_features)]
 
 extern crate async_drop_dep;
diff --git a/tests/ui/async-await/async-drop/dependency-dropped.run.stdout b/tests/ui/async-await/async-drop/dependency-dropped.with_feature.run.stdout
index 7aaf70c12d6..7aaf70c12d6 100644
--- a/tests/ui/async-await/async-drop/dependency-dropped.run.stdout
+++ b/tests/ui/async-await/async-drop/dependency-dropped.with_feature.run.stdout
diff --git a/tests/ui/async-await/async-drop/dependency-dropped.without_feature.run.stdout b/tests/ui/async-await/async-drop/dependency-dropped.without_feature.run.stdout
new file mode 100644
index 00000000000..80eeeefc222
--- /dev/null
+++ b/tests/ui/async-await/async-drop/dependency-dropped.without_feature.run.stdout
@@ -0,0 +1 @@
+Sync drop
diff --git a/tests/ui/async-await/async-drop/dependency-dropped.without_feature.stderr b/tests/ui/async-await/async-drop/dependency-dropped.without_feature.stderr
new file mode 100644
index 00000000000..96a4572055c
--- /dev/null
+++ b/tests/ui/async-await/async-drop/dependency-dropped.without_feature.stderr
@@ -0,0 +1,10 @@
+warning: found async drop types in dependency `async_drop_dep`, but async_drop feature is disabled for `dependency_dropped`
+  --> $DIR/dependency-dropped.rs:7:1
+   |
+LL | #![cfg_attr(with_feature, feature(async_drop))]
+   | ^
+   |
+   = help: if async drop type will be dropped in a crate without `feature(async_drop)`, sync Drop will be used
+
+warning: 1 warning emitted
+
diff --git a/tests/ui/async-await/async-drop/deref-later-projection.rs b/tests/ui/async-await/async-drop/deref-later-projection.rs
new file mode 100644
index 00000000000..baf81daf766
--- /dev/null
+++ b/tests/ui/async-await/async-drop/deref-later-projection.rs
@@ -0,0 +1,26 @@
+// Ex-ICE: #140975
+//@ compile-flags: -Zvalidate-mir
+//@ build-pass
+//@ edition:2021
+#![crate_type = "lib"]
+#![feature(async_drop)]
+#![allow(incomplete_features)]
+
+use std::{future::AsyncDrop, pin::Pin};
+
+struct HasAsyncDrop ;
+impl Drop for HasAsyncDrop {
+    fn drop(&mut self) {}
+}
+impl AsyncDrop for HasAsyncDrop {
+    async fn drop(self: Pin<&mut Self>) {}
+}
+
+struct Holder {
+    inner: HasAsyncDrop,
+}
+async fn bar() {
+    Holder {
+        inner: HasAsyncDrop
+   };
+}
diff --git a/tests/ui/async-await/async-drop/elaborate-index-out-of-bounds.rs b/tests/ui/async-await/async-drop/elaborate-index-out-of-bounds.rs
new file mode 100644
index 00000000000..bd0a95eb1e4
--- /dev/null
+++ b/tests/ui/async-await/async-drop/elaborate-index-out-of-bounds.rs
@@ -0,0 +1,17 @@
+//@ edition: 2024
+// Ex-ICE: #140974
+#![crate_type = "lib"]
+#![allow(incomplete_features)]
+#![feature(async_drop)]
+use core::future::AsyncDrop;
+
+async fn fun(_: HasIncompleteAsyncDrop) {}
+
+struct HasIncompleteAsyncDrop;
+impl Drop for HasIncompleteAsyncDrop {
+    fn drop(&mut self) {}
+}
+impl AsyncDrop for HasIncompleteAsyncDrop {
+    //~^ ERROR: not all trait items implemented, missing: `drop` [E0046]
+    // not implemented yet..
+}
diff --git a/tests/ui/async-await/async-drop/elaborate-index-out-of-bounds.stderr b/tests/ui/async-await/async-drop/elaborate-index-out-of-bounds.stderr
new file mode 100644
index 00000000000..d8582398c79
--- /dev/null
+++ b/tests/ui/async-await/async-drop/elaborate-index-out-of-bounds.stderr
@@ -0,0 +1,11 @@
+error[E0046]: not all trait items implemented, missing: `drop`
+  --> $DIR/elaborate-index-out-of-bounds.rs:14:1
+   |
+LL | impl AsyncDrop for HasIncompleteAsyncDrop {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `drop` in implementation
+   |
+   = help: implement the missing item: `async fn drop(self: Pin<&mut Self>) { todo!() }`
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0046`.
diff --git a/tests/ui/async-await/async-drop/open-drop-error2.rs b/tests/ui/async-await/async-drop/open-drop-error2.rs
new file mode 100644
index 00000000000..b2a7b68190e
--- /dev/null
+++ b/tests/ui/async-await/async-drop/open-drop-error2.rs
@@ -0,0 +1,21 @@
+//@compile-flags: -Zvalidate-mir -Zinline-mir=yes --crate-type=lib
+
+#![feature(async_drop)]
+#![allow(incomplete_features)]
+
+use std::{
+    future::{Future, async_drop_in_place},
+    pin::pin,
+    task::Context,
+};
+
+fn wrong() -> impl Sized {
+    //~^ ERROR: the size for values of type `str` cannot be known at compilation time
+    *"abc" // Doesn't implement Sized
+}
+fn weird(context: &mut Context<'_>) {
+    let mut e = wrong();
+    let h = unsafe { async_drop_in_place(&raw mut e) };
+    let i = pin!(h);
+    i.poll(context);
+}
diff --git a/tests/ui/async-await/async-drop/open-drop-error2.stderr b/tests/ui/async-await/async-drop/open-drop-error2.stderr
new file mode 100644
index 00000000000..e849829b1c7
--- /dev/null
+++ b/tests/ui/async-await/async-drop/open-drop-error2.stderr
@@ -0,0 +1,19 @@
+error[E0277]: the size for values of type `str` cannot be known at compilation time
+  --> $DIR/open-drop-error2.rs:12:15
+   |
+LL | fn wrong() -> impl Sized {
+   |               ^^^^^^^^^^ doesn't have a size known at compile-time
+LL |
+LL |     *"abc" // Doesn't implement Sized
+   |     ------ return type was inferred to be `str` here
+   |
+   = help: the trait `Sized` is not implemented for `str`
+help: references are always `Sized`, even if they point to unsized data; consider not dereferencing the expression
+   |
+LL -     *"abc" // Doesn't implement Sized
+LL +     "abc" // Doesn't implement Sized
+   |
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0277`.