error in IE11 with "internals/well-known-symbol.js"

[scrollbar-ww]

version: core-js@3.0.0

"internals/fix-regexp-well-known-symbol-logic.js":
line: 8
var SPECIES = wellKnownSymbol('species')
this "wellKnownSymbol" method got wrong.

"internals/well-known-symbol.js":

module.exports = function (name) {
  return store[name] || (store[name] = NATIVE_SYMBOL && Symbol[name]
    || (NATIVE_SYMBOL ? Symbol : uid)('Symbol.' + name));
};

there's no global Symbol, and "NATIVE_SYMBOL" is "true"

[scrollbar-ww]

upgrade to core-js@3.0.0， in my bundled js file，there're these "Symbol" stuff，but not exist @v2.6.5

more configuration files:
"babel.config.js":

module.exports = {
  presets: [
    [
      '@babel/preset-env',
      {
        modules: false,
        useBuiltIns: 'usage',
        corejs: 3
      }
    ]
  ]
}

".browserslistrc"

chrome >= 50
firefox >= 50
ie >= 10

[zloirock]

there's no global Symbol, and "NATIVE_SYMBOL" is "true"

I have no ideas in which case it's possible - without global Symbol, NATIVE_SYMBOL can't be true. Could you add a simple reproducible example?

[somebody32]

Not sure if better is to open a new issue or piggyback on that one but I too have issues in IE11 trying to upgrade to core-js 3.

The error is Exception thrown and not caught, is caused by internals/internal-state.js line 26 because !isObject(it) returns true.

I've started with just plain import "core-js/stable" but managed to pin it down to import "core-js/es/symbol".

Where should I look to provide more data about the issue? Thanks in advance!

[zloirock]

@somebody32 seems it's another issue. Could you open it and provide more data / a reproducible example?

[somebody32]

@zloirock thanks, done #514

[zloirock]

@scrollbar-ww are you sure that core-js is not transpiled by babel? It could be one of the reasons for this issue.

[scrollbar-ww]

i am using rollup & rollp-plugin-babel plugin for bundling my project，here's the plugin args:

const babelPlugin = require('rollup-plugin-babel')
// ...
babelPlugin({
  exclude: [/\/core-js\//],
  externalHelpers: true
})

[alippai]

Rollup treeshakes the following:

// Chrome 38 Symbol has incorrect toString conversion
module.exports = !require('../internals/fails')(function () {
  // eslint-disable-next-line no-undef
  String(Symbol());
});

into:

// Chrome 38 Symbol has incorrect toString conversion
module.exports = !require('../internals/fails')(function () {
});

Which evaluates to true

[zloirock]

Interesting. Seems it's a rollup issue, could you create it in their repo? I can add a workaround to core-js.