Auto merge of #75944 - jumbatm:issue-75924-clashing-extern-decl-ice, r=spastorino

Fix ICE on unwrap of unknown layout in ClashingExternDeclarations.

Fixes #75924.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/ui/lint/clashing-extern-fn.rs b/src/test/ui/lint/clashing-extern-fn.rs
index d6ac7ccccc7..44cef19b0d3 100644
--- a/src/test/ui/lint/clashing-extern-fn.rs
+++ b/src/test/ui/lint/clashing-extern-fn.rs
@@ -285,3 +285,26 @@ mod null_optimised_enums {
         }
     }
 }
+
+#[allow(improper_ctypes)]
+mod unknown_layout {
+    mod a {
+        extern "C" {
+            pub fn generic(l: Link<u32>);
+        }
+        pub struct Link<T> {
+            pub item: T,
+            pub next: *const Link<T>,
+        }
+    }
+
+    mod b {
+        extern "C" {
+            pub fn generic(l: Link<u32>);
+        }
+        pub struct Link<T> {
+            pub item: T,
+            pub next: *const Link<T>,
+        }
+    }
+}