X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=tests%2Fui%2Fderives%2Fderiving-with-repr-packed.rs;h=58be4519720178b8fab1f5504fc43607bc8e05a9;hb=a70d03b62454f57672e14b48715ae10c01e5fd34;hp=afa91da133dc0f0b862211777c837d3bb4564741;hpb=ef934d9b632b8ac00276558824664c104b92b5f0;p=rust.git

diff --git a/tests/ui/derives/deriving-with-repr-packed.rs b/tests/ui/derives/deriving-with-repr-packed.rs
index afa91da133d..58be4519720 100644
--- a/tests/ui/derives/deriving-with-repr-packed.rs
+++ b/tests/ui/derives/deriving-with-repr-packed.rs
@@ -33,4 +33,14 @@ struct FlexZeroSlice {
     //~^^ this was previously accepted
 }
 
+// Again, currently allowed, but will be phased out.
+#[derive(Debug)]
+#[repr(packed)]
+struct WithStr {
+    width: u8,
+    data: str,
+    //~^ WARNING string slice in a packed struct that derives a built-in trait
+    //~^^ this was previously accepted
+}
+
 fn main() {}