1 files changed, 12 insertions, 0 deletions
diff --git a/src/test/ui/unsafe/ranged_ints4.rs b/src/test/ui/unsafe/ranged_ints4.rs
new file mode 100644
index 000000000..fe80af454
--- /dev/null
+++ b/src/test/ui/unsafe/ranged_ints4.rs
@@ -0,0 +1,12 @@
+// revisions: mirunsafeck thirunsafeck
+// [thirunsafeck]compile-flags: -Z thir-unsafeck
+
+#![feature(rustc_attrs)]
+
+#[rustc_layout_scalar_valid_range_start(1)]
+#[repr(transparent)]
+pub(crate) struct NonZero<T>(pub(crate) T);
+fn main() {
+    let mut x = unsafe { NonZero(1) };
+    x.0 = 0; //~ ERROR mutation of layout constrained field is unsafe
+}