From 042c148b5d5543ded91dd50f4e844dd53540fb1b Mon Sep 17 00:00:00 2001
From: farewell-zy <84722638+farewell-zy@users.noreply.github.com>
Date: Mon, 10 Oct 2022 22:58:13 +0800
Subject: [PATCH] =?UTF-8?q?start=EF=BC=8Cend=E5=AD=98=E5=9C=A8undefined?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 packages/babel-generator/src/printer.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/babel-generator/src/printer.ts b/packages/babel-generator/src/printer.ts
index 70cf22cf6721..9acbe5dd4bee 100644
--- a/packages/babel-generator/src/printer.ts
+++ b/packages/babel-generator/src/printer.ts
@@ -951,8 +951,8 @@ class Printer {
         const comment = comments[i];
 
         if (hasLoc && "loc" in comment && !this._printedComments.has(comment)) {
-          const commentStartLine = comment.loc.start.line;
-          const commentEndLine = comment.loc.end.line;
+          const commentStartLine = comment.loc?.start.line;
+          const commentEndLine = comment.loc?.end.line;
           if (type === COMMENT_TYPE.LEADING) {
             let offset = 0;
             if (i === 0) {