Minifier too agressive deletes used code

[santialbo]

Verify canary release

• I verified that the issue exists in the latest Next.js canary release

Provide environment information

Operating System:
      Platform: darwin
      Arch: arm64
      Version: Darwin Kernel Version 22.5.0: Thu Jun  8 22:22:20 PDT 2023; root:xnu-8796.121.3~7/RELEASE_ARM64_T6000
    Binaries:
      Node: 18.16.0
      npm: 9.5.1
      Yarn: 1.22.19
      pnpm: N/A
    Relevant Packages:
      next: 13.4.14-canary.0
      eslint-config-next: N/A
      react: 18.2.0
      react-dom: 18.2.0
      typescript: N/A
    Next.js Config:
      output: N/A

Which area(s) of Next.js are affected? (leave empty if unsure)

SWC minifier (swcMinify: true), SWC transpilation

Link to the code that reproduces this issue or a replay of the bug

https://github.com/santialbo/next-swc-issue

To Reproduce

Create a basic next app

npx create-next-app@latest nextjs-blog --use-npm --example "https://github.com/vercel/next-learn/tree/master/basics/learn-starter"

Create a /pages component like the following

export default function Home() {
  return (
    <div>{foo.a}</div>
  )
}

const foo = {
  get a() {
    return `a ${this.b}`;
  },
  get b() {
    return `b`;
  }
}

Run yarn build and inspect .next/chunks/pages/{chunk of the used page}, the following will be generated:

(self.webpackChunk_N_E=self.webpackChunk_N_E||[]).push([[405],{5557:function(n,t,u){(window.__NEXT_P=window.__NEXT_P||[]).push(["/",function(){return u(6616)}])},6616:function(n,t,u){"use strict";u.r(t),u.d(t,{default:function(){return r}});var e=u(5893);function r(){return(0,e.jsx)("div",{children:c.a})}let c={get a(){return"a ".concat(this.b)}}}},function(n){n.O(0,[774,888,179],function(){return n(n.s=5557)}),_N_E=n.O()}]);

The previous foo object gets compiled into

let c={get a(){return"a ".concat(this.b)}}

Notice property get b is missing! The resulting string is a undefined instead of a b;

Describe the Bug

The minifier is too agressive eliminating dead code which is not actually dead.

I noticed this error in my codebase when I upgraded from 13.4.9 to 13.4.13

Expected Behavior

Don't delete actually used property.

Which browser are you using? (if relevant)

No response

How are you deploying your application? (if relevant)

No response

_NEXT-1502

[balazsorban44]

Looks like it's a regression that slipped in via #52371, we are looking into it, thanks for reporting!

[github-actions]

This closed issue has been automatically locked because it had no new activity for 2 weeks. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.