Function createRuntimeError

packages/core/src/render3/errors_di.ts:128–139

(message: string, code: number, path?: string[])

 * be reused later, before throwing the final error.
 */
export function createRuntimeError(message: string, code: number, path?: string[]): Error {
  // Cast to `any`, so that extra info can be monkey-patched onto this instance.
  const error = new RuntimeError(code, message) as any;

  // Monkey-patch a runtime error code and a path onto an Error instance.
  error[NG_RUNTIME_ERROR_CODE] = code;
  error[NG_RUNTIME_ERROR_MESSAGE] = message;
  if (path) {
    error[NG_TOKEN_PATH] = path;
  }
  return error;
}

/**
 * Reads monkey-patched error code from the given Error instance.