$ node inspect -e "console.log()"
debug> watch()
debug> watch(1)
debug> watchers
  0: undefined = '<Invalid parameters>'
  1: 1 = '<Invalid parameters>'

$ node inspect -e "console.log()"
debug> watch()
node:internal/validators:119
    throw new ERR_INVALID_ARG_TYPE(name, 'string', value);
    ^

Uncaught:
TypeError [ERR_INVALID_ARG_TYPE]: The "expression" argument must be of type string. Received undefined