Local env variables are loaded with inlined comments

[OGReabon]

Link to the code that reproduces this issue

Link

To Reproduce

1. In .env file define NEXT_PUBLIC_SOMETHING variable and add comment after it as #some comment that should not be loaded
2. Use the NEXT_PUBLIC_SOMETHING variable somewhere and log it.
3. Start the application and see that both the value and the comment are printed in the log.

Current vs. Expected behavior

Currently the dotenv loader loads everything after the = sign.
Expected behaviour would be that the loader only loads the value and not the comment.

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 23.0.0: Fri Sep 15 14:41:34 PDT 2023; root:xnu-10002.1.13~1/RELEASE_ARM64_T8103
    Binaries:
      Node: 21.1.0
      npm: 10.2.0
      Yarn: 1.22.19
      pnpm: N/A
    Relevant Packages:
      next: 13.4.9
      eslint-config-next: 13.4.9
      react: 18.2.0
      react-dom: 18.2.0
      typescript: 5.1.6
    Next.js Config:
      output: N/A

Which area(s) are affected? (Select all that apply)

Not sure

Additional context

No response

[nextjs-bot]

This issue has been automatically marked as stale due to two years of inactivity. It will be closed in 7 days unless there’s further input. If you believe this issue is still relevant, please leave a comment or provide updated details. Thank you.

[nextjs-bot]

This issue has been automatically closed due to two years of inactivity. If you’re still experiencing a similar problem or have additional details to share, please open a new issue following our current issue template. Your updated report helps us investigate and address concerns more efficiently. Thank you for your understanding!