1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/lint/issue-34798.rs b/tests/ui/lint/issue-34798.rs
new file mode 100644
index 000000000..f0d710123
--- /dev/null
+++ b/tests/ui/lint/issue-34798.rs
@@ -0,0 +1,25 @@
+// run-pass
+#![forbid(improper_ctypes)]
+#![allow(dead_code)]
+
+#[repr(C)]
+pub struct Foo {
+    size: u8,
+    __value: ::std::marker::PhantomData<i32>,
+}
+
+#[repr(C)]
+pub struct ZeroSizeWithPhantomData<T>(::std::marker::PhantomData<T>);
+
+#[repr(C)]
+pub struct Bar {
+    size: u8,
+    baz: ZeroSizeWithPhantomData<i32>,
+}
+
+extern "C" {
+    pub fn bar(_: *mut Foo, _: *mut Bar);
+}
+
+fn main() {
+}