Avoid crash when "--max-old-space-size" is present

[evanw]

↪️ Pull Request

This is a fix for issue #4795. Parcel 2 runs out of memory building large code bases. Normally you can pass the --max-old-space-size=... flag to node to increase the memory ceiling for node programs, but this doesn't work with Parcel because passing this flag causes Parcel to crash.

💻 Examples

The crash looks like this:

$ npm install parcel
$ touch empty.js
$ node --max-old-space-size=8192 node_modules/.bin/parcel empty.js
Error [ERR_WORKER_INVALID_EXEC_ARGV] Initiated Worker with invalid execArgv flags: --max-old-space-size=8192
    at new Worker (internal/worker.js:134:13)
    ...

This change prevents the crash.

🚨 Test instructions

I ran this command inside the Parcel repo to test this change:

yarn build && NODE_ENV=test node --max-old-space-size=8192 node_modules/.bin/mocha

This command fails without my change and passes with my change.

✔️ PR Todo

• Added/updated unit tests for this change
• Filled out test instructions (In case there aren't any unit tests)
• Included links to related issues/PRs

[height]

Link Height tasks by mentioning a task ID in the pull request title or description, commit messages, or comments.

💡Tip: You can also use "Close T-X" to automatically close a task when the pull request is merged.