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Should throw on `async () => await 5 ** 6;`

See original GitHub issue

espree parse this as await (5 ** 6)

require('espree').parse('async () => await 5 ** 6', {ecmaVersion: 2017}).body[0].expression.body
Node {
  type: 'AwaitExpression',
  start: 12,
  end: 24,
  argument: Node {
    type: 'BinaryExpression',
    start: 18,
    end: 24,
    left: Node { type: 'Literal', start: 18, end: 19, value: 5, raw: '5' },
    operator: '**',
    right: Node { type: 'Literal', start: 23, end: 24, value: 6, raw: '6' }
  }
}

In chrome, this is a syntax error

async () => await 5 ** 6
VM40:1 Uncaught SyntaxError: Unary operator used immediately before exponentiation expression. Parenthesis must be used to disambiguate operator precedence

Babel PR babel/babel#12441

Issue Analytics

State:
Created 2 years ago
Comments:11 (9 by maintainers)

Top GitHub Comments

2reactions

robpalmecommented, Apr 28, 2021

@mdjermanovic as you requested, I have opened an issue and created a PR to fix this in Acorn.

1reaction

nzakascommented, Apr 30, 2021

You are my hero @robpalme. Thank you.

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