1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/async-await/issue-74497-lifetime-in-opaque.rs b/src/test/ui/async-await/issue-74497-lifetime-in-opaque.rs
new file mode 100644
index 000000000..2d765eb41
--- /dev/null
+++ b/src/test/ui/async-await/issue-74497-lifetime-in-opaque.rs
@@ -0,0 +1,19 @@
+// edition:2018
+
+// test that names give to anonymous lifetimes in opaque types like `impl Future` are correctly
+// introduced in error messages
+
+use std::future::Future;
+
+pub async fn foo<F, T>(_: F)
+where
+    F: Fn(&u8) -> T,
+    T: Future<Output = ()>,
+{
+}
+
+pub async fn bar(_: &u8) {}
+
+fn main() {
+    let _ = foo(|x| bar(x)); //~ ERROR lifetime may not live long enough
+}