Error: Unexpected early exit

[mcriley821]

• Rollup Plugin Name: plugin-terser
• Rollup Plugin Version: 0.4.3
• Rollup Version: 3.29.2
• Operating System (or Browser): aarch64 android
• Node Version: 20.2.0
• Link to reproduction (⚠️ read below):

https://stackblitz.com/edit/rollup-repro-myx9um

Expected Behavior

Build to complete successfully

Actual Behavior

[!] Error: Unexpected early exit. This happens when Promises returned by plugins cannot resolve. Unfinished hook action(s) on exit:
(terser) renderChunk
    at process.handleBeforeExit (/data/data/com.termux/files/usr/lib/node_modules/rollup/dist/shared/rollup.js:26388:28)
    at Object.onceWrapper (node:events:626:26)
    at process.emit (node:events:511:28)

Additional Information

I didn't see a way to change the architecture in stackblitz, so the build runs okay. This indicates there's some architecture problem with aarch64, I'm trying to pinpoint whether it's in the plugin or rollup itself.

[easrng]

I'm hitting this too :/

~/enafore $ node --version
v20.2.0
~/enafore $ uname -a
Linux localhost 5.10.194-android13-4-g290eb1d8e5b9 #1 SMP PREEMPT Wed Sep 6 02:22:22 UTC 2023 aarch64 Android
~/enafore $

terser itself runs fine

~/enafore $ echo 'a      = true' | pnpx terser
Packages: +12
++++++++++++
Progress: resolved 12, reused 12, downloaded 0, added 12, done
a=true;
~/enafore $

I'm out and about rn (which is why I'm doing dev in termux lol) but when I get home I can try to debug.

[easrng]

okay looks like the issue is os.cpus() can return [], in which case WorkerPool.maxInstances defaults to 0, so a new worker will never be added and the tasks won't run.

[easrng]

a workaround until the fix is merged is to set maxWorkers: cpus().length || 1 manually
unfortunately, terser checks for extra unrecognized options so you need to

Object.defineProperties(options, {
  maxWorkers: {
    value: cpus().length || 1,
    enumerable: false
  }
})

[mcriley821]

Awesome. Thank you for looking into this!