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Conflicting behavior run with babel-node and node, see my script in issue body. #10679

shenxiang11 opened this issue Nov 8, 2019 · 3 comments


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@shenxiang11 shenxiang11 commented Nov 8, 2019

Bug Report

Current Behavior
babel-node returns undefined
node throws an error ReferenceError: x is not defined

Input Code

var x = 1;

function foo(x = x) {


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@babel-bot babel-bot commented Nov 8, 2019

Hey @shenxiang11! We really appreciate you taking the time to report an issue. The collaborators on this project attempt to help as many people as possible, but we're a limited number of volunteers, so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack community that typically always has someone willing to help. You can sign-up here for an invite."


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@qodesmith qodesmith commented Nov 10, 2019

What's the expected result? I ran that in Chrome's console and it threw a different error:

Uncaught ReferenceError: Cannot access 'x' before initialization

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@shenxiang11 shenxiang11 commented Nov 11, 2019

I'm not sure if babel-node and node should has same behavior.

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