"ios_saf/11.0.0" es.symbol.description does not support

A bug report

What

Symbol('foo').description == 'foo' in “ios_saf/11.0.0” return false

Details

• Browser : Mozilla/5.0 (iPhone; CPU iPhone OS 11_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
• Device IPhone 6 puls 11.4.1

// node_modules/core-js-compat/data.json

{
"es.symbol": {
    "android": "49",
    "chrome": "49",
    "deno": "1.0",
    "edge": "15",
    "electron": "0.37",
    "firefox": "51",
    "ios": "10.0",
    "node": "6.0",
    "opera": "36",
    "opera_mobile": "36",
    "safari": "10.0",
    "samsung": "5.0"
  },
  "es.symbol.description": {
    "android": "70",
    "chrome": "70",
    "deno": "1.0",
    "edge": "74",
    "electron": "5.0",
    "firefox": "63",
    "ios": "12.2",
    "node": "11.0",
    "opera": "57",
    "opera_mobile": "49",
    "safari": "12.1",
    "samsung": "10.0"
  }
}

[romainmenke]

I don’t think that url is correct. When using always you should also use gated (not required, but we don’t test or expect everything to work with always without gated).

I think the polyfill script is just throwing errors because of that and any polyfills after the error are not applied.

[chenyulun]

I was wrong, I thought these attributes were added by default, so I added them again

// ....
'Reflect.preventExtensions',
  'Reflect.set',
  'Reflect.setPrototypeOf',
+ 'Symbol.prototype.description',
+ 'Symbol.for',
+ 'Symbol.isConcatSpreadable',
+ 'Symbol.keyFor',
  // 'setImmediate',
]);