1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/lint/issue-83477.rs b/tests/ui/lint/issue-83477.rs
new file mode 100644
index 000000000..4262a2879
--- /dev/null
+++ b/tests/ui/lint/issue-83477.rs
@@ -0,0 +1,16 @@
+// compile-flags: -Zunstable-options
+// check-pass
+#![warn(rustc::internal)]
+
+#[allow(rustc::foo::bar::default_hash_types)]
+//~^ WARN unknown lint: `rustc::foo::bar::default_hash_types`
+//~| HELP did you mean
+//~| SUGGESTION rustc::default_hash_types
+#[allow(rustc::foo::default_hash_types)]
+//~^ WARN unknown lint: `rustc::foo::default_hash_types`
+//~| HELP did you mean
+//~| SUGGESTION rustc::default_hash_types
+fn main() {
+    let _ = std::collections::HashMap::<String, String>::new();
+    //~^ WARN prefer `FxHashMap` over `HashMap`, it has better performance
+}