1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-union-uninitialized.rs b/tests/ui/borrowck/borrowck-union-uninitialized.rs
new file mode 100644
index 00000000000..bbe9f22aac3
--- /dev/null
+++ b/tests/ui/borrowck/borrowck-union-uninitialized.rs
@@ -0,0 +1,18 @@
+struct S {
+    a: u8,
+}
+
+union U {
+    a: u8,
+}
+
+fn main() {
+    unsafe {
+        let mut s: S;
+        let mut u: U;
+        s.a = 0; //~ ERROR E0381
+        u.a = 0; //~ ERROR E0381
+        let sa = s.a;
+        let ua = u.a;
+    }
+}