@swc/core removes the abstract declaration of the class, but the abstract declaration of the field is still there

[Yekongs]

Describe the bug

When disableBuiltinTransformsForInternalTesting is on，@swc/core processes an abstract class, it removes the abstract declaration of the class, but the abstract of the field remains, resulting in a syntax error

Input code

export default abstract class Predictor {
  abstract _type: string;
}

Config

{
  "jsc": {
    "parser": {
      "syntax": "typescript",
      "tsx": true
    },
    "experimental": {
      "disableBuiltinTransformsForInternalTesting": true
    }
  },
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.7.4&code=H4sIAAAAAAAAA0utKMgvKlFISU1LLM0pUUhMKi4pSkwuUUjOSSwuVggoSk3JTC7JL1Ko5lJASMaXVBakWikAeZl56dZctVwAIiWcUEYAAAA%3D&config=H4sIAAAAAAAAA1WMQQqDQAxF955iyNoTdOmi0L0XSDUtKWMckgiKeHdTS4vd5b9H3lqlBC%2Fr4JLWOGMUVCP97SC2iOMcBHwpZJ1ycai%2F1u2tXCc6yPYRQHMh5YHiNZ9jPRveMzUTZ2dpFcUeow52HfUmTiqYW7JQz79qdZS3Hb53%2FwKvAAAA

SWC Info output

No response

Expected behavior

The abstract of the class should not be removed, otherwise it will cause syntax errors

Actual behavior

The abstract of the class was removed, and a syntax error occurred.

Version

1.7.4

Additional context

I added disableBuiltinTransformsForInternalTesting because I want my custom swc-loader to keep the source code as similar as possible after processing tsx/jsx, for example, tags are not converted to function form. The purpose is not to affect other people's swc-loader or plugins

Tasks

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[swc-bot]

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