From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../variance-contravariant-arg-trait-match.rs      | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 src/test/ui/variance/variance-contravariant-arg-trait-match.rs

(limited to 'src/test/ui/variance/variance-contravariant-arg-trait-match.rs')

diff --git a/src/test/ui/variance/variance-contravariant-arg-trait-match.rs b/src/test/ui/variance/variance-contravariant-arg-trait-match.rs
new file mode 100644
index 000000000..e0b280105
--- /dev/null
+++ b/src/test/ui/variance/variance-contravariant-arg-trait-match.rs
@@ -0,0 +1,28 @@
+#![allow(dead_code)]
+
+// Test that even when `T` is only used in contravariant position, it
+// is treated as invariant.
+
+trait Get<T> {
+    fn get(&self, t: T);
+}
+
+fn get_min_from_max<'min, 'max, G>()
+    where 'max : 'min, G : Get<&'max i32>
+{
+    impls_get::<G,&'min i32>()
+    //~^ ERROR lifetime may not live long enough
+}
+
+fn get_max_from_min<'min, 'max, G>()
+    where 'max : 'min, G : Get<&'min i32>
+{
+    // Previously OK, but now an error because traits are invariant:
+
+    impls_get::<G,&'max i32>()
+    //~^ ERROR lifetime may not live long enough
+}
+
+fn impls_get<G,T>() where G : Get<T> { }
+
+fn main() { }
-- 
cgit v1.2.3