let-else: test for issue 93951 / temporary lifetimes

Author: cormacrelf

src/test/ui/let-else/let-else-temp-borrowck.rs

@@ -0,0 +1,26 @@
+// check-pass
+//
+// from issue #93951, where borrowck complained the temporary that `foo(&x)` was stored in was to
+// be dropped sometime after `x` was. It then suggested adding a semicolon that was already there.
+
+#![feature(let_else)]
+use std::fmt::Debug;
+
+fn foo<'a>(x: &'a str) -> Result<impl Debug + 'a, ()> {
+    Ok(x)
+}
+
+fn let_else() {
+    let x = String::from("Hey");
+    let Ok(s) = foo(&x) else { return };
+}
+
+fn if_let() {
+    let x = String::from("Hey");
+    let s = if let Ok(s) = foo(&x) { s } else { return };
+}
+
+fn main() {
+    let_else();
+    if_let();
+}