Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-32008.rs b/tests/ui/issues/issue-32008.rs
new file mode 100644
index 000000000..6c2e20679
--- /dev/null
+++ b/tests/ui/issues/issue-32008.rs
@@ -0,0 +1,28 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(unused_variables)]
+// Tests that binary operators allow subtyping on both the LHS and RHS,
+// and as such do not introduce unnecessarily strict lifetime constraints.
+
+use std::ops::Add;
+
+struct Foo;
+
+impl<'a> Add<&'a Foo> for &'a Foo {
+    type Output = ();
+    fn add(self, rhs: &'a Foo) {}
+}
+
+fn try_to_add(input: &Foo) {
+    let local = Foo;
+
+    // Manual reborrow worked even with invariant trait search.
+    &*input + &local;
+
+    // Direct use of the reference on the LHS requires additional
+    // subtyping before searching (invariantly) for `LHS: Add<RHS>`.
+    input + &local;
+}
+
+fn main() {
+}