1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/transmutability/unions/boolish.rs b/tests/ui/transmutability/unions/boolish.rs
new file mode 100644
index 00000000000..e469c497353
--- /dev/null
+++ b/tests/ui/transmutability/unions/boolish.rs
@@ -0,0 +1,31 @@
+// check-pass
+
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![feature(marker_trait_attr)]
+#![allow(dead_code)]
+#![allow(incomplete_features)]
+
+mod assert {
+    use std::mem::{Assume, BikeshedIntrinsicFrom};
+    pub struct Context;
+
+    pub fn is_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, { Assume::SAFETY }>
+    {}
+}
+
+fn should_match_bool() {
+    #[derive(Copy, Clone)] #[repr(u8)] pub enum False { V = 0 }
+    #[derive(Copy, Clone)] #[repr(u8)] pub enum True { V = 1 }
+
+    #[repr(C)]
+    pub union Bool {
+        pub f: False,
+        pub t: True,
+    }
+
+    assert::is_transmutable::<Bool, bool>();
+    assert::is_transmutable::<bool, Bool>();
+}