babel-traverse Scope.rename bad case

[yulanggong]

Bug Report

• I would like to work on a fix!
  a fix is here scope.rename() missing identifier in VariableDeclarator #11595

I add a test case here:
yulanggong@0dfff88

Input Code

function test(b) {
  var a = b + 1,
      a = a + 1,
      a = a + 1;

  return a;
}

Plugin Code

module.exports = function() {
  return {
    visitor: {
      Scope(path) {
        path.scope.rename("a", "_a");
      }
    }
  };
}

Expected Result

function test(b) {
  var _a = b + 1,
      _a = _a + 1,
      _a = _a + 1;

  return _a;
}

Current Result

function test(b) {
  var _a = b + 1,
      a = _a + 1,
      _a = _a + 1;

  return _a;
}

Diff

- Expected
+ Received

  function test(b) {
    var _a = b + 1,
-       _a = _a + 1,
+       a = _a + 1,
        _a = _a + 1;

    return _a;
  }

Environment

System:
    OS: macOS 10.15.4
  Binaries:
    Node: 10.16.3 - ~/.nvm/versions/node/v10.16.3/bin/node
    Yarn: 1.22.4 - ~/.nvm/versions/node/v10.16.3/bin/yarn
    npm: 6.14.4 - ~/.nvm/versions/node/v10.16.3/bin/npm
  Monorepos:
    Lerna: 3.19.0
  npmPackages:
    @babel/cli: ^7.8.4 => 7.8.4
    @babel/core: ^7.9.6 => 7.9.6
    @babel/eslint-plugin-development: ^1.0.1 => 1.0.1
    @babel/plugin-proposal-class-properties: ^7.8.3 => 7.8.3
    @babel/plugin-proposal-dynamic-import: ^7.8.3 => 7.8.3
    @babel/plugin-proposal-export-namespace-from: ^7.8.3 => 7.8.3
    @babel/plugin-proposal-object-rest-spread: ^7.9.6 => 7.9.6
    @babel/plugin-transform-flow-strip-types: ^7.9.0 => 7.9.0
    @babel/plugin-transform-for-of: ^7.9.0 => 7.9.0
    @babel/plugin-transform-modules-commonjs: ^7.9.6 => 7.9.6
    @babel/plugin-transform-runtime: ^7.9.6 => 7.9.6
    @babel/preset-env: ^7.9.6 => 7.9.6
    @babel/preset-flow: ^7.9.0 => 7.9.0
    @babel/register: ^7.9.0 => 7.9.0
    @babel/runtime: ^7.9.6 => 7.9.6
    babel-eslint: ^11.0.0-beta.2 => 11.0.0-beta.2
    babel-jest: ^24.9.0 => 24.9.0
    babel-plugin-transform-charcodes: ^0.2.0 => 0.2.0
    eslint: ^6.8.0 => 6.8.0
    gulp-babel: ^8.0.0 => 8.0.0
    jest: ^24.9.0 => 24.9.0
    lerna: ^3.19.0 => 3.19.0
    rollup-plugin-babel: ^4.4.0 => 4.4.0

Possible Solution

Additional context
Add any other context about the problem here. Or a screenshot if applicable

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