add regression test for #79467

Author: TaKO8Ki

Diff for: src/test/rustdoc-ui/issue-79467.rs

@@ -0,0 +1,8 @@
+fn g()
+where
+    'static: 'static,
+    dyn 'static: 'static + Copy, //~ ERROR at least one trait is required for an object type
+{
+}
+
+fn main() {}

Diff for: src/test/rustdoc-ui/issue-79467.stderr

@@ -0,0 +1,9 @@
+error[E0224]: at least one trait is required for an object type
+  --> $DIR/issue-79467.rs:4:5
+   |
+LL |     dyn 'static: 'static + Copy,
+   |     ^^^^^^^^^^^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0224`.