Tree shaking with TS throw `token.ts does not export 'Token'`

🐛 bug report

Parcel says Token, which is a typescript interface, is not exported when I use --experimental-scope-hoisting.

I create a repo to reproduce this issue.

🎛 Configuration (.babelrc, package.json, cli command)

>>> git clone https://github.com/ocavue/parcel_issue_3153.git
>>> cd parcel_issue_3153
>>> yarn install
✨  Done in 0.38s.

>>> yarn run build1
yarn run v1.16.0
$ parcel build index.html
✨  Built in 45ms.

dist/tmp_parcel_issue.a55b6250.js        1.71 KB    9ms
dist/tmp_parcel_issue.a55b6250.js.map    1.03 KB    3ms
dist/index.html                            304 B    5ms
✨  Done in 0.74s.

>>> yarn run build2                                                                                                                               
yarn run v1.16.0
$ parcel build index.html --experimental-scope-hoisting
🚨  pkg/token.ts does not export 'Token'
    at replaceExportNode (/tmp/parcel_issue/node_modules/parcel-bundler/src/scope-hoisting/concat.js:54:13)
    at ReferencedIdentifier (/tmp/parcel_issue/node_modules/parcel-bundler/src/scope-hoisting/concat.js:317:20)
    at newFn (/tmp/parcel_issue/node_modules/parcel-bundler/node_modules/@babel/traverse/lib/visitors.js:230:17)
    at NodePath._call (/tmp/parcel_issue/node_modules/parcel-bundler/node_modules/@babel/traverse/lib/path/context.js:53:20)
    at NodePath.call (/tmp/parcel_issue/node_modules/parcel-bundler/node_modules/@babel/traverse/lib/path/context.js:40:17)
    at NodePath.visit (/tmp/parcel_issue/node_modules/parcel-bundler/node_modules/@babel/traverse/lib/path/context.js:88:12)
    at TraversalContext.visitQueue (/tmp/parcel_issue/node_modules/parcel-bundler/node_modules/@babel/traverse/lib/context.js:118:16)
    at TraversalContext.visitSingle (/tmp/parcel_issue/node_modules/parcel-bundler/node_modules/@babel/traverse/lib/context.js:90:19)
    at TraversalContext.visit (/tmp/parcel_issue/node_modules/parcel-bundler/node_modules/@babel/traverse/lib/context.js:146:19)
    at Function.traverse.node (/tmp/parcel_issue/node_modules/parcel-bundler/node_modules/@babel/traverse/lib/index.js:94:17)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

🤔 Expected Behavior

yarn run build2 should work

😯 Current Behavior

yarn run build2 doesn’t work

💁 Possible Solution

🔦 Context

Maybe it’s a duplicate of #2837. But this issue involves TS so I’m not sure.

💻 Code Sample

N/A

🌍 Your Environment

Software	Version(s)
Parcel	1.12.3
Node	12.4.0
npm/Yarn	yarn 1.16.0
Operating System	macOS 10.13

[ocavue]

Thank you so much for your comments. I have found a solution after reading the docs you quoted.

<<<<<<<<<<<<<<<<<<<<<<<<pkg/main.ts>>>>>>>>>>>>>>>>>>>>>
import { Token } from './token'
export type Token = Token
export { func } from "./func"

BTW, a related issue can be found here: https://github.com/babel/babel/issues/8361

[ocavue]

Since it’s actually a Babel issue instead of a parcel issue, I close it.