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

[srinesha]

Version

29.2.5

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.

Debug log

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Additional context

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

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

[ahnpnl]

Hi, ts-jest isn't responsible for generating coverage report. Coverage report is handled by Jest itself.

[srinesha]

Created this in jest
jestjs/jest#15293