1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/infinite/infinite-autoderef.rs b/tests/ui/infinite/infinite-autoderef.rs
new file mode 100644
index 00000000000..cbbe1f81df8
--- /dev/null
+++ b/tests/ui/infinite/infinite-autoderef.rs
@@ -0,0 +1,26 @@
+// error-pattern: reached the recursion limit while auto-dereferencing
+// compile-flags: -Zdeduplicate-diagnostics=yes
+
+use std::ops::Deref;
+
+struct Foo;
+
+impl Deref for Foo {
+    type Target = Foo;
+
+    fn deref(&self) -> &Foo {
+        self
+    }
+}
+
+pub fn main() {
+    let mut x;
+    loop {
+        x = Box::new(x);
+        x.foo;
+        x.bar();
+    }
+
+    Foo.foo;
+    Foo.bar();
+}