1 files changed, 31 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-26205.rs b/src/test/ui/issues/issue-26205.rs
new file mode 100644
index 000000000..f5f39ded0
--- /dev/null
+++ b/src/test/ui/issues/issue-26205.rs
@@ -0,0 +1,31 @@
+// check-pass
+#![allow(dead_code)]
+use std::ops::{Deref, DerefMut};
+
+struct Foo;
+
+impl Foo {
+    fn foo_mut(&mut self) {}
+}
+
+struct Bar(Foo);
+
+impl Deref for Bar {
+    type Target = Foo;
+
+    fn deref(&self) -> &Foo {
+        &self.0
+    }
+}
+
+impl DerefMut for Bar {
+    fn deref_mut(&mut self) -> &mut Foo {
+        &mut self.0
+    }
+}
+
+fn test(mut bar: Box<Bar>) {
+    bar.foo_mut();
+}
+
+fn main() {}