From bc87123af9ce9cfb14a886fdb6c8b0916af1668d Mon Sep 17 00:00:00 2001
From: liuxingbaoyu <30521560+liuxingbaoyu@users.noreply.github.com>
Date: Thu, 13 Feb 2020 10:06:22 +0800
Subject: [PATCH] fix @babel/traverse can't use path.remove() with noScope

---
 packages/babel-traverse/src/path/removal.js |  4 +++-
 packages/babel-traverse/test/removal.js     | 19 +++++++++++++++----
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/packages/babel-traverse/src/path/removal.js b/packages/babel-traverse/src/path/removal.js
index 9ddf0a201448..83e792e9be62 100644
--- a/packages/babel-traverse/src/path/removal.js
+++ b/packages/babel-traverse/src/path/removal.js
@@ -7,7 +7,9 @@ export function remove() {
   this._assertUnremoved();
 
   this.resync();
-  this._removeFromScope();
+  if (this.opts && !this.opts.noScope) {
+    this._removeFromScope();
+  }
 
   if (this._callRemovalHooks()) {
     this._markRemoved();
diff --git a/packages/babel-traverse/test/removal.js b/packages/babel-traverse/test/removal.js
index f500eb37ddd0..8ed424e374ed 100644
--- a/packages/babel-traverse/test/removal.js
+++ b/packages/babel-traverse/test/removal.js
@@ -6,7 +6,7 @@ function getPath(code) {
   const ast = parse(code);
   let path;
   traverse(ast, {
-    Program: function(_path) {
+    Program: function (_path) {
       path = _path;
       _path.stop();
     },
@@ -19,9 +19,9 @@ function generateCode(path) {
   return generate(path.node).code;
 }
 
-describe("removal", function() {
-  describe("ArrowFunction", function() {
-    it("remove body", function() {
+describe("removal", function () {
+  describe("ArrowFunction", function () {
+    it("remove body", function () {
       const rootPath = getPath("x = () => b;");
       const path = rootPath
         .get("body")[0]
@@ -33,4 +33,15 @@ describe("removal", function() {
       expect(generateCode(rootPath)).toBe("x = () => {};");
     });
   });
+
+  it("remove with noScope", function () {
+    const ast = parse("a=1");
+    traverse(ast, {
+      AssignmentExpression: function (path) {
+        path.remove();
+      },
+    });
+
+    expect(generate(ast).code).toBe("");
+  });
 });