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-rw-r--r--src/test/ui/issues/issue-39367.rs42
1 files changed, 42 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-39367.rs b/src/test/ui/issues/issue-39367.rs
new file mode 100644
index 000000000..e7beb8a03
--- /dev/null
+++ b/src/test/ui/issues/issue-39367.rs
@@ -0,0 +1,42 @@
+// run-pass
+// revisions: mir thir
+// [thir]compile-flags: -Zthir-unsafeck
+
+use std::ops::Deref;
+
+struct ArenaSet<U: Deref, V=<U as Deref>::Target>(U, &'static V)
+ where V: 'static + ?Sized;
+
+static Z: [u8; 4] = [1,2,3,4];
+
+fn arena() -> &'static ArenaSet<Vec<u8>> {
+ fn __static_ref_initialize() -> ArenaSet<Vec<u8>> {
+ ArenaSet(vec![], &Z)
+ }
+ unsafe {
+ use std::sync::Once;
+ fn require_sync<T: Sync>(_: &T) { }
+ unsafe fn __stability() -> &'static ArenaSet<Vec<u8>> {
+ use std::mem::transmute;
+ static mut DATA: *const ArenaSet<Vec<u8>> = std::ptr::null_mut();
+
+ static mut ONCE: Once = Once::new();
+ ONCE.call_once(|| {
+ DATA = transmute
+ ::<Box<ArenaSet<Vec<u8>>>, *const ArenaSet<Vec<u8>>>
+ (Box::new(__static_ref_initialize()));
+ });
+
+ &*DATA
+ }
+ let static_ref = __stability();
+ require_sync(static_ref);
+ static_ref
+ }
+}
+
+fn main() {
+ let &ArenaSet(ref u, v) = arena();
+ assert!(u.is_empty());
+ assert_eq!(v, Z);
+}