1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/pub/issue-33174-restricted-type-in-public-interface.rs b/src/test/ui/pub/issue-33174-restricted-type-in-public-interface.rs
new file mode 100644
index 000000000..67f888c5e
--- /dev/null
+++ b/src/test/ui/pub/issue-33174-restricted-type-in-public-interface.rs
@@ -0,0 +1,28 @@
+#![allow(non_camel_case_types)] // genus is always capitalized
+
+pub(crate) struct Snail;
+//~^ NOTE `Snail` declared as private
+
+mod sea {
+    pub(super) struct Turtle;
+    //~^ NOTE `Turtle` declared as crate-private
+}
+
+struct Tortoise;
+//~^ NOTE `Tortoise` declared as private
+
+pub struct Shell<T> {
+    pub(crate) creature: T,
+}
+
+pub type Helix_pomatia = Shell<Snail>;
+//~^ ERROR private type `Snail` in public interface
+//~| NOTE can't leak private type
+pub type Dermochelys_coriacea = Shell<sea::Turtle>;
+//~^ ERROR crate-private type `Turtle` in public interface
+//~| NOTE can't leak crate-private type
+pub type Testudo_graeca = Shell<Tortoise>;
+//~^ ERROR private type `Tortoise` in public interface
+//~| NOTE can't leak private type
+
+fn main() {}