The emitWarning method should retain an attribute that is a reference to the native WARNING

[WzFFzW]

The emitWarning method should retain an attribute that is a reference to the native WARNING, just like WEBPACK thread-loader link

// ...
emitWarning: (warning) => {
  writeJson({
    type: 'emitWarning',
    id,
    data: toErrorObj(warning),
  });
},

function toErrorObj(err) {
  return {
    message: err.message,
    details: err.details,
    stack: err.stack,
    hideStack: err.hideStack,
  };
}

webpack link

constructor(warning, { from = null } = {}) {
  let message = "Module Warning";

  if (from) {
    message += ` (from ${from}):\n`;
  } else {
    message += ": ";
  }

  if (warning && typeof warning === "object" && warning.message) {
    message += warning.message;
  } else if (warning) {
    message += String(warning);
  }

  super(message);

  this.name = "ModuleWarning";
  this.warning = warning;
  this.details =
    warning && typeof warning === "object" && warning.stack
      ? cleanUp(warning.stack, this.message)
      : undefined;

  Error.captureStackTrace(this, this.constructor);
}

EmitError method is best like this