internal: Record unresolved derive invocations in hir

crates/hir/src/semantics/source_to_def.rs

@@ -248,7 +248,7 @@ impl SourceToDefCtx<'_, '_> {
         &mut self,
         item: InFile<&ast::Item>,
         src: InFile<ast::Attr>,
-    ) -> Option<&[MacroCallId]> {
+    ) -> Option<&[Option<MacroCallId>]> {
         let map = self.dyn_map(item)?;
         map[keys::DERIVE_MACRO].get(&src).map(AsRef::as_ref)
     }