[Bug]: Line under a decorator is not marked as covered in coverage report

[srinesha]

Version

29.7.0

Steps to reproduce

1. Create a decorator with JavaScript stage 3 decorator features. (No experimentalDecorators or emitDecoratorMetadata needed)
2. Add a test to decorated function
3. Run the test with coverage report

Expected behavior

Coverage report should cover 100% of the code in every category

Actual behavior

Coverage report leave the line below the decorator as uncovered line.

Additional context

Repo where you can recreate this issue:
https://github.com/srinesha/decorator-coverage-issue

Steps:

• yarn install to install dependencies
• yarn test:coverage to run test and generate the coverage report

Environment

System:
    OS: Linux 6.6 NixOS 24.05 (Uakari) 24.05 (Uakari)
    CPU: (12) x64 12th Gen Intel(R) Core(TM) i7-1255U
  Binaries:
    Node: 22.4.1 - /etc/profiles/per-user/s1n7ax/bin/node
    Yarn: 1.22.22 - /etc/profiles/per-user/s1n7ax/bin/yarn
    npm: 10.8.1 - /etc/profiles/per-user/s1n7ax/bin/npm
    pnpm: 8.15.5 - /etc/profiles/per-user/s1n7ax/bin/pnpm

[cenfun]

It seems it's a issue from transpiled decorator code. The first decorator could never be covered.

After checking the transpiled code coverage, the first property indeed has not been covered.
And there are 3 different processing for the properties:

It is the same issue after changing the order.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[david2tm]

having the same issue