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Symbol array props! let a = Symbol('a'), b = Symbol('b') let x = { [[a, b]]() { return 'test' } } console.log(x[[a, b]]()) //prints 'test'

@brandonhorst I am pretty sure this should throw an error when it tries to concatenate a and b...

@domenic That's what I figured too. This is in babel, I think it's coercing to string.

@brandonhorst Yeah operators are hard to transpile :(. I guess poisoned valueOf() might work well enough. @sebmck

@domenic @brandonhorst Yeah, you can't coerce symbols to string. Issue with the polyfill, might be as simple as adding a throw to toString.