Rollup merge of #58306 - GuillaumeGomez:crate-browser-history, r=QuietMisdreavus

[rust.git] / src / libsyntax / ext / derive.rs

diff --git a/src/libsyntax/ext/derive.rs b/src/libsyntax/ext/derive.rs
index 03d68f4257f1b1c238bf527135d31fda8994eb70..6df369133d01dd99630a838bc672ed6e3abe2000 100644 (file)
--- a/src/libsyntax/ext/derive.rs
+++ b/src/libsyntax/ext/derive.rs
@@ -58,10 +58,10 @@ pub fn add_derived_markers<T>(cx: &mut ExtCtxt<'_>, span: Span, traits: &[ast::P
         call_site: span,
         def_site: None,
         format: ExpnFormat::MacroAttribute(Symbol::intern(&pretty_name)),
-        allow_internal_unstable: vec![
+        allow_internal_unstable: Some(vec![
             Symbol::intern("rustc_attrs"),
             Symbol::intern("structural_match"),
-        ],
+        ].into()),
         allow_internal_unsafe: false,
         local_inner_macros: false,
         edition: hygiene::default_edition(),