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Export is not defined #10044

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jj-choi opened this issue May 30, 2019 · 5 comments

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@jj-choi
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commented May 30, 2019

Bug Report

Current Behavior
SyntaxError: Export 'Foo' is not defined

Input Code

interface Foo {}

export type { Foo }

Expected behavior/code
no error

Babel Configuration (.babelrc, package.json, cli command)
flow plugin

Environment

  • Babel version(s): 7.4.5
  • Node/npm version: Node 11.13 / npm 6.7

Possible Solution
flowParseInterfaceish() should call checkLVal() or scope.declareName()

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commented May 30, 2019

Hey @jj-choi! 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.

@ksocha

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commented May 31, 2019

I've encountered similar issue with @babel/plugin-transform-typescript@7.4.5. Everything works fine with @babel/plugin-transform-typescript@7.4.4

@JoshRobertson

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commented May 31, 2019

I've also encountered this issue upgrading from 7.4.4 to 7.4.5

@tanhauhau

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commented Jun 15, 2019

@ksocha @JoshRobertson could you guys explain more on the specific code that produces error in typescript?

I couldn't replicate it

@ksocha

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commented Jun 15, 2019

@tanhauhau

I've created a repo using create-react-app that replicates the issue: https://github.com/ksocha/typescript-plugin-issue

With 7.4.5, you'll see that exported function is undefined.
Works fine with 7.4.4.

You can change versions by modifying resolutions entry in package.json.

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