1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/union/union-repr-c.stderr b/src/test/ui/union/union-repr-c.stderr
new file mode 100644
index 000000000..9abf440f7
--- /dev/null
+++ b/src/test/ui/union/union-repr-c.stderr
@@ -0,0 +1,21 @@
+error: `extern` block uses type `W`, which is not FFI-safe
+  --> $DIR/union-repr-c.rs:15:22
+   |
+LL |     static FOREIGN2: W;
+   |                      ^ not FFI-safe
+   |
+note: the lint level is defined here
+  --> $DIR/union-repr-c.rs:2:9
+   |
+LL | #![deny(improper_ctypes)]
+   |         ^^^^^^^^^^^^^^^
+   = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this union
+   = note: this union has unspecified layout
+note: the type is defined here
+  --> $DIR/union-repr-c.rs:9:1
+   |
+LL | union W {
+   | ^^^^^^^
+
+error: aborting due to previous error
+