1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/transmutability/primitives/bool.rs b/tests/ui/transmutability/primitives/bool.rs
new file mode 100644
index 00000000000..eebb74fff47
--- /dev/null
+++ b/tests/ui/transmutability/primitives/bool.rs
@@ -0,0 +1,25 @@
+#![crate_type = "lib"]
+#![feature(transmutability)]
+#![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 }>
+    {}
+
+    pub fn is_maybe_transmutable<Src, Dst>()
+    where
+        Dst: BikeshedIntrinsicFrom<Src, Context, { Assume::SAFETY.and(Assume::VALIDITY) }>
+    {}
+}
+
+fn contrast_with_u8() {
+    assert::is_transmutable::<u8, bool>(); //~ ERROR cannot be safely transmuted
+    assert::is_maybe_transmutable::<u8, bool>();
+    assert::is_transmutable::<bool, u8>();
+}