Move /src/test to /tests

tests/ui/unsafe/ranged_ints2_const.rs

@@ -0,0 +1,29 @@
+// 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() {
+}
+
+const fn foo() -> NonZero<u32> {
+    let mut x = unsafe { NonZero(1) };
+    let y = &mut x.0; //~ ERROR mutable references
+    //~^ ERROR mutation of layout constrained field is unsafe
+    unsafe { NonZero(1) }
+}
+
+const fn bar() -> NonZero<u32> {
+    let mut x = unsafe { NonZero(1) };
+    let y = unsafe { &mut x.0 }; //~ ERROR mutable references
+    unsafe { NonZero(1) }
+}
+
+const fn boo() -> NonZero<u32> {
+    let mut x = unsafe { NonZero(1) };
+    unsafe { let y = &mut x.0; } //~ ERROR mutable references
+    unsafe { NonZero(1) }
+}