From 9f7ad5ee77d88cd70a1ba95c6a888a36b26271e2 Mon Sep 17 00:00:00 2001
From: dianne <diannes.gm@gmail.com>
Date: Sun, 28 Sep 2025 23:48:32 -0700
Subject: [PATCH] add a test for shortening `super let` binding lifetimes

---
 .../extended-super-let-bindings.rs                    | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 tests/ui/lifetimes/lint-macro-extended-temporary-scopes/extended-super-let-bindings.rs

diff --git a/tests/ui/lifetimes/lint-macro-extended-temporary-scopes/extended-super-let-bindings.rs b/tests/ui/lifetimes/lint-macro-extended-temporary-scopes/extended-super-let-bindings.rs
new file mode 100644
index 000000000000..950d1a4eaaa9
--- /dev/null
+++ b/tests/ui/lifetimes/lint-macro-extended-temporary-scopes/extended-super-let-bindings.rs
@@ -0,0 +1,11 @@
+//! Some temporaries are implemented as local variables bound with `super let`. These can be
+//! lifetime-extended, and as such are subject to shortening after #145838.
+//@ edition: 2024
+//@ check-pass
+
+fn main() {
+    // The `()` argument to the inner `format_args!` is promoted, but the lifetimes of the internal
+    // `super let` temporaries in its expansion shorten, making this an error in Rust 1.92.
+    println!("{:?}{}", (), { format_args!("{:?}", ()) });
+    // TODO: warn
+}