1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/union/union-const-eval.rs b/src/test/ui/union/union-const-eval.rs
new file mode 100644
index 000000000..32ee4a739
--- /dev/null
+++ b/src/test/ui/union/union-const-eval.rs
@@ -0,0 +1,15 @@
+// check-pass
+// revisions: mirunsafeck thirunsafeck
+// [thirunsafeck]compile-flags: -Z thir-unsafeck
+
+union U {
+    a: usize,
+    b: usize,
+}
+
+const C: U = U { a: 10 };
+
+fn main() {
+    let a: [u8; unsafe { C.a }];
+    let b: [u8; unsafe { C.b }];
+}