1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/nll/issue-45157.rs b/src/test/ui/nll/issue-45157.rs
new file mode 100644
index 000000000..8d2bf22a0
--- /dev/null
+++ b/src/test/ui/nll/issue-45157.rs
@@ -0,0 +1,31 @@
+#![allow(unused)]
+
+
+#[derive(Clone, Copy, Default)]
+struct S {
+    a: u8,
+    b: u8,
+}
+#[derive(Clone, Copy, Default)]
+struct Z {
+    c: u8,
+    d: u8,
+}
+
+union U {
+    s: S,
+    z: Z,
+}
+
+fn main() {
+    unsafe {
+        let mut u = U { s: Default::default() };
+
+        let mref = &mut u.s.a;
+        *mref = 22;
+
+        let nref = &u.z.c;
+        //~^ ERROR cannot borrow `u` (via `u.z.c`) as immutable because it is also borrowed as mutable (via `u.s.a`) [E0502]
+        println!("{} {}", mref, nref)
+    }
+}