From 5b200a6d3dbe63bb6cad153f3b9b7780530f0941 Mon Sep 17 00:00:00 2001
From: Stephen Chung <schungx@live.com>
Date: Tue, 21 Feb 2023 18:20:25 +0800
Subject: [PATCH] Fix  build.

---
 src/ast/ast.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ast/ast.rs b/src/ast/ast.rs
index 8a23d96e..84057e6a 100644
--- a/src/ast/ast.rs
+++ b/src/ast/ast.rs
@@ -87,7 +87,7 @@ impl AST {
         Self {
             source: None,
             #[cfg(feature = "metadata")]
-            doc: crate::SmartString::new_const(),
+            doc: None,
             body: (!stmt.is_empty()).then(|| stmt.into()),
             #[cfg(not(feature = "no_function"))]
             lib: functions.into(),