minify turns "a?.b instanceof c" into "a?.binstanceof c"

[mrdaniellewis]

Describe the bug

With the minify option a?.b instanceof c becomes a?.binstanceof c.

(Sorry if already reported)

Input code

`a?.b instanceof c`

Config

{
  "jsc": {
    "parser": {
      "syntax": "typescript",
      "decorators": true,
      "tsx": false
    },
    "transform": {
      "decoratorVersion": "2022-03"
    },
    "target": "es2022",
    "loose": false,
    "minify": {
      "compress": false,
      "mangle": false
    }
  },
  "module": {
    "type": "commonjs"
  },
  "minify": true,
  "isModule": true
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.7.42&code=H4sIAAAAAAAAA8tMU9BItNdLUsjMKy5JzEtOzU9TSNZUqOZSUEjOzyvOz0nVy8lP11DPSM3JyVfX5KpVQAUAQu8VekAAAAA%3D&config=H4sIAAAAAAAAA1VQQQ6DMAy78wqU8yYhdtsfdt29KgEV0aZKijSE%2BPta1jK4JbYTW16ruoZRNDzrNY5x8YoF%2BdgjIosL6hMRCItH0Wx8gFthO9TEKhBLVASe8WCCpKNeTYI7tP0YCKyc9MT2bHK8eSOLIZfs2qZt780DrteKBwyJRkmCnAQmIsHilzFrnOmXs40m6xlFrsIkVW6Y8Jq3yq5gqZt3MneUekgJ4jdLbhT4K4tjaQKMvMp1wqrtC7NZO0JzAQAA

SWC Info output

No response

Expected behavior

There needs to be a space before instanceof

a?.b instanceof c

Actual behavior

There is no space before instanceof and it is a syntax error.

Version

= 1.7.42

Additional context

Noticed as from version 1.7.42 terser can no longer minify https://mozilla.github.io/pdf.js/

[kdy1]

I think #9675 is the cause cc @CamWass

[kdy1]

Oh. Sorry, #9675 was 1.7.40

[kdy1]

Changeset was the cause of 1.7.40 vs 1.7.42 and it seems like I didn't review carefully enough. Sorry for the inconvinience.

[kdy1]

I think this is a serious issue so I triggered 1.9.1 publish pipeline.
https://github.com/swc-project/swc/actions/runs/11703603896