From e3b19e5c25d2de305939a5cc73dcbdf3ae64bd94 Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Thu, 3 Jun 2021 15:48:33 +0200
Subject: [PATCH] Add test for issue 84666.

---
 library/core/tests/any.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/library/core/tests/any.rs b/library/core/tests/any.rs
index b0dc9903464..b36d6f0d404 100644
--- a/library/core/tests/any.rs
+++ b/library/core/tests/any.rs
@@ -114,3 +114,16 @@ fn any_unsized() {
     fn is_any<T: Any + ?Sized>() {}
     is_any::<[i32]>();
 }
+
+#[test]
+fn distinct_type_names() {
+    // https://github.com/rust-lang/rust/issues/84666
+
+    struct Velocity(f32, f32);
+
+    fn type_name_of_val<T>(_: T) -> &'static str {
+        type_name::<T>()
+    }
+
+    assert_ne!(type_name_of_val(Velocity), type_name_of_val(Velocity(0.0, -9.8)),);
+}