Rollup merge of #68072 - JohnTitor:fix-macro-ice, r=petrochenkov

Fix ICE #68058

Fixes #68058

r? @petrochenkov

2 files changed, 20 insertions, 1 deletions

diff --git a/src/librustc_ast_lowering/expr.rs b/src/librustc_ast_lowering/expr.rs
index ee020c7e589..9a229e709a5 100644
--- a/src/librustc_ast_lowering/expr.rs
+++ b/src/librustc_ast_lowering/expr.rs
@@ -202,7 +202,12 @@ impl<'hir> LoweringContext<'_, 'hir> {
             ExprKind::Mac(_) => panic!("Shouldn't exist here"),
         };
 
-        hir::Expr { hir_id: self.lower_node_id(e.id), kind, span: e.span, attrs: e.attrs.clone() }
+        hir::Expr {
+            hir_id: self.lower_node_id(e.id),
+            kind,
+            span: e.span,
+            attrs: e.attrs.iter().map(|a| self.lower_attr(a)).collect::<Vec<_>>().into(),
+        }
     }
 
     fn lower_unop(&mut self, u: UnOp) -> hir::UnOp {
diff --git a/src/test/ui/macros/issue-68058.rs b/src/test/ui/macros/issue-68058.rs
new file mode 100644
index 00000000000..24da2620c2e
--- /dev/null
+++ b/src/test/ui/macros/issue-68058.rs
@@ -0,0 +1,14 @@
+// check-pass
+
+macro_rules! foo {
+    ($doc: expr) => {
+        fn f() {
+            #[doc = $doc]
+            ()
+        }
+    };
+}
+
+foo!("doc");
+
+fn main() {}