funcunit/site/node_modules/core-js/modules/$.fails-is-regexp.js

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var MATCH = require('./$.wks')('match');
module.exports = function(KEY){
  var re = /./;
  try {
    '/./'[KEY](re);
  } catch(e){
    try {
      re[MATCH] = false;
      return !'/./'[KEY](re);
    } catch(f){ /* empty */ }
  } return true;
};