1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/union/union-derive-eq.rs b/tests/ui/union/union-derive-eq.rs
new file mode 100644
index 000000000..b7e7f343f
--- /dev/null
+++ b/tests/ui/union/union-derive-eq.rs
@@ -0,0 +1,21 @@
+// revisions: mirunsafeck thirunsafeck
+// [thirunsafeck]compile-flags: -Z thir-unsafeck
+
+#[derive(Eq)] // OK
+union U1 {
+    a: u8,
+}
+
+impl PartialEq for U1 { fn eq(&self, rhs: &Self) -> bool { true } }
+
+#[derive(PartialEq, Copy, Clone)]
+struct PartialEqNotEq;
+
+#[derive(Eq)]
+union U2 {
+    a: PartialEqNotEq, //~ ERROR the trait bound `PartialEqNotEq: Eq` is not satisfied
+}
+
+impl PartialEq for U2 { fn eq(&self, rhs: &Self) -> bool { true } }
+
+fn main() {}