`dead_code` treats `#[repr(transparent)]` the same as `#[repr(C)]`

Fixes #119659

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/ui/lint/dead-code/type-in-transparent.rs b/tests/ui/lint/dead-code/type-in-transparent.rs
new file mode 100644
index 00000000000..5dd6f93fd03
--- /dev/null
+++ b/tests/ui/lint/dead-code/type-in-transparent.rs
@@ -0,0 +1,14 @@
+// Verify that we do not warn on fields that are part of transparent types.
+// check-pass
+#![deny(dead_code)]
+
+#[repr(transparent)]
+struct NamedStruct { field: u8 }
+
+#[repr(transparent)]
+struct TupleStruct(u8);
+
+fn main() {
+    let _ = NamedStruct { field: 1 };
+    let _ = TupleStruct(1);
+}