From fb783653322156ba616e6175e76fd53106977a3f Mon Sep 17 00:00:00 2001
From: lyj <sjtu5140809011@gmail.com>
Date: Thu, 16 Sep 2021 16:52:57 +0800
Subject: [PATCH] add 3414 test

---
 tests/ui/wrong_self_convention2.rs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tests/ui/wrong_self_convention2.rs b/tests/ui/wrong_self_convention2.rs
index 501bc1e6a85..dd3e842c925 100644
--- a/tests/ui/wrong_self_convention2.rs
+++ b/tests/ui/wrong_self_convention2.rs
@@ -68,3 +68,22 @@ trait Foo: Sized {
         fn as_byte_slice(slice: &[Self]) -> &[u8];
     }
 }
+
+mod issue3414 {
+    struct CellLikeThing<T>(T);
+
+    impl<T> CellLikeThing<T> {
+        // don't trigger
+        fn into_inner(this: Self) -> T {
+            this.0
+        }
+    }
+
+    impl<T> std::ops::Deref for CellLikeThing<T> {
+        type Target = T;
+
+        fn deref(&self) -> &T {
+            &self.0
+        }
+    }
+}