[Bug]: custom reporter getLastError() -> this._shouldFail is undefined

[mickeyjc]

Version

29.7.0

Steps to reproduce

I have followed the below document to create my own custom reporter,
https://jestjs.io/docs/configuration#custom-reporters

class CustomReporter {
  constructor(globalConfig, reporterOptions, reporterContext) {
    this._globalConfig = globalConfig;
    this._options = reporterOptions;
    this._context = reporterContext;
  }

  // Optionally, reporters can force Jest to exit with non zero code by returning
  // an `Error` from `getLastError()` method.
  getLastError() {
    console.log('this._shouldFail', this._shouldFail);
    if (this._shouldFail) {
      return new Error('Custom error reported!');
    }
  }
}

Expected behavior

when test fails., it should print out this._shouldFail true, and also should throw non 0 exit code

Actual behavior

console logged this._shouldFail undefined., and no error was thrown

Additional context

my jest.config.js as below

module.exports = {
  preset: 'ts-jest',
  collectCoverage: true,
  collectCoverageFrom: [
    'src/**/*.js',
    'src/**/*.ts',
    'src/**/*.tsx',
  ],
  transform: {
    '^.+\\.(ts|tsx)?$': 'ts-jest',
    '^.+\\.(js|jsx)$': 'babel-jest',
  },
  testMatch: ['**/_test_/**/*.test.js?(x)'],
  coverageReporters: ['json-summary'],
  reporters: ['default', '<rootDir>/scripts/customTestReporter.js'],
};

Environment

System:
OS: macOS 14.7
CPU: (8) arm64 Apple M3
Binaries:
Node: 18.14.0 - ~/.nvm/versions/node/v18.14.0/bin/node
Yarn: 1.22.22 - ~/.nvm/versions/node/v18.14.0/bin/yarn
npm: 9.3.1 - ~/.nvm/versions/node/v18.14.0/bin/npm
npmPackages:
jest: ^29.7.0 => 29.7.0