Parcel Build Crashes Due To Segmentation Faults

🐛 bug report

When running Parcel 2.2.1, the build fails with one of several error messages:

• free(): invalid pointer
• Segmentation fault
• free(): double free detected in tcache 2

All of these errors occurred running the exact same command (parcel build) one after the other with no changes to the code.

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

Package.json:

{
  "name": "furryfont",
  "version": "1.0.0",
  "source": "index.html",
  "browserslist": "> 0.5%, last 2 versions, not dead",
  "author": "anonusr",
  "license": "AGPL-3.0-only",
  "scripts": {
    "start": "parcel",
    "build": "parcel build",
    "deploy": "echo 'furryfont.anonusr.org' > ./dist/CNAME && gh-pages -d dist"
  },
  "devDependencies": {
    "gh-pages": "^3.2.3",
    "parcel": "^2.2.0"
  }
}

🤔 Expected Behavior

Parcel does not crash.

😯 Current Behavior

Parcel crashes. Here is one of the possible errors:

yarn run v1.22.5
$ parcel build --log-level verbose
✨ Built in 1.27s

dist/index.html    5.13 KB    783ms
free(): double free detected in tcache 2
Aborted

💻 Code Sample

The issue is happening for me with this code here: https://github.com/an0nusr/furryfont/commit/7e279a691c8faeeaac536debf3557b1ec838322c

The code is pretty simple - there’s no modules to bundle - just simple inline js in HTML.

Note: the yarn lockfile in that commit was using Parcel 2.2.0 - the issue occurs in 2.2.1

🌍 Your Environment

Software	Version(s)
Parcel	2.2.1
Node	v12.22.7
npm/Yarn	yarn 1.22.5
Operating System	Ubuntu 18.04

[devongovett]

I think we narrowed this down to an upgrade of napi-rs in the @parcel/source-map package, which was released sometime after Parcel 2.2.1. I still don’t know the exact root cause, but for now I’ve reverted this upgrade and published @parcel/source-map v2.0.2. See https://github.com/parcel-bundler/source-map/pull/91.

You’ll need to remove @parcel/source-map 2.0.1 from your lock file and re-install to get the upgrade. Please comment whether this works for you. Apologies again for the issue, and thanks for your patience while we track it down.

[devongovett]

Does it work for anyone if you set the PARCEL_WORKER_BACKEND=process environment variable?