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Basic .parcelrc crashes Parcel

See original GitHub issue

Using the following .parcelrc crashes the latest alpha release 2.0.0-alpha.2.1.

{
  "extends": "@parcel/config-default",
  "transforms": {
    "*.js": ["@parcel/transformer-babel"]
  }
}

Error thrown:

🚨 The expression evaluated to a falsy value:

  (0, _assert.default)(typeof v === 'string')


  (0, _assert.default)(typeof v === 'string')

    at assertString (/home/romu/tmp/parcel-ssr/node_modules/@parcel/scope-hoisting/lib/link.js:47:23)
    at /home/romu/tmp/parcel-ssr/node_modules/@parcel/scope-hoisting/lib/link.js:89:16
    at enter (/home/romu/tmp/parcel-ssr/node_modules/@parcel/core/lib/Graph.js:475:16)
    at enter (/home/romu/tmp/parcel-ssr/node_modules/@parcel/core/lib/Graph.js:475:16)
    at enter (/home/romu/tmp/parcel-ssr/node_modules/@parcel/core/lib/Graph.js:475:16)
    at walk (/home/romu/tmp/parcel-ssr/node_modules/@parcel/core/lib/Graph.js:310:26)
    at walk (/home/romu/tmp/parcel-ssr/node_modules/@parcel/core/lib/Graph.js:331:22)
    at Graph.dfs (/home/romu/tmp/parcel-ssr/node_modules/@parcel/core/lib/Graph.js:355:12)
    at Graph.traverse (/home/romu/tmp/parcel-ssr/node_modules/@parcel/core/lib/Graph.js:257:17)
    at Graph.filteredTraverse (/home/romu/tmp/parcel-ssr/node_modules/@parcel/core/lib/Graph.js:265:17)

Repro: https://github.com/brillout/parcel-ssr

Context: I want to build an SSR tool on top of Parcel.

Env: Linux / parcel@2.0.0-alpha.2.1 / node@12.2.0 / yarn@1.19.1

Issue Analytics

State:
Created 4 years ago
Reactions:2
Comments:21 (3 by maintainers)

Top GitHub Comments

5reactions

Cristy94commented, Mar 20, 2020

Using scopehoisting requires that “@parcel/transformer-js” transforms the assets (and set some metadata). The only thing we can do here is give a better error message. You should use a ˚.parcelrc` like this one:
{
  "extends": "@parcel/config-default",
  "transforms": {
    "*.js": ["@parcel/transformer-babel", "@parcel/transformer-js"]
  }
}

I too got the error The expression evaluated to a falsy value and tried to add this as my .parcelrc, but it doesn’t work:

{ [Error: Invalid Parcel Config]
  diagnostics:
   [ { message: 'Invalid Parcel Config',
       origin: '@parcel/core',
       filePath: '.parcelrc',
       language: 'json',
       codeFrame: [Object] } ],
  name: 'Error' }

3reactions

Krizzcommented, May 27, 2021

For me, it seems like updating from beta-3.1 to the latest nightly (2.0.0-nightly.688) fixed the issue.