1 files changed, 40 insertions, 0 deletions
diff --git a/tests/ui/coherence/deep-bad-copy-reason.rs b/tests/ui/coherence/deep-bad-copy-reason.rs
new file mode 100644
index 000000000..80bbe387a
--- /dev/null
+++ b/tests/ui/coherence/deep-bad-copy-reason.rs
@@ -0,0 +1,40 @@
+#![feature(extern_types)]
+
+extern "Rust" {
+    type OpaqueListContents;
+}
+
+pub struct ListS<T> {
+    len: usize,
+    data: [T; 0],
+    opaque: OpaqueListContents,
+}
+
+pub struct Interned<'a, T>(&'a T);
+
+impl<'a, T> Clone for Interned<'a, T> {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+impl<'a, T> Copy for Interned<'a, T> {}
+
+pub struct List<'tcx, T>(Interned<'tcx, ListS<T>>);
+//~^ NOTE this field does not implement `Copy`
+//~| NOTE the `Copy` impl for `Interned<'tcx, ListS<T>>` requires that `OpaqueListContents: Sized`
+
+impl<'tcx, T> Clone for List<'tcx, T> {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+impl<'tcx, T> Copy for List<'tcx, T> {}
+//~^ ERROR the trait `Copy` may not be implemented for this type
+
+fn assert_is_copy<T: Copy>() {}
+
+fn main() {
+    assert_is_copy::<List<'static, ()>>();
+}