🐞 bug report

Affected Rule

py_test

Is this a regression?

Yes, bug was introduced in #2409

Description

No coverage report is generated for --@rules_python//python/config_settings:bootstrap_impl=script

🔬 Minimal Reproduction

Steps to reproduce the issue:

1. Clone the repository:

   git clone git@github.com:bazelbuild/rules_python.git
   cd rules_python/examples/bzlmod

2. Run the following command to clean and generate a coverage report:

   bazelisk clean && \
   bazelisk coverage //tests:version_default_test --combined_report=lcov \
       --@rules_python//python/config_settings:bootstrap_impl=script \
       --cache_test_results=no --instrument_test_targets && \
   lcov --list bazel-out/_coverage/_coverage_report.dat

3. Error Observed:

   lcov: ERROR: no valid records found in tracefile bazel-out/_coverage/_coverage_report.dat
   (use "lcov --ignore-errors empty ..." to bypass this error)

4. Checkout a specific commit regression:

   git checkout 4a55ef4c2363f7ffc1ec9ba511fba7b2547ccefc
   bazelisk clean && \
   bazelisk coverage //tests:version_default_test --combined_report=lcov \
       --@rules_python//python/config_settings:bootstrap_impl=script \
       --cache_test_results=no --instrument_test_targets && \
   lcov --list bazel-out/_coverage/_coverage_report.dat

5. Output Observed:

                       |Lines       |Functions  |Branches
   Filename            |Rate     Num|Rate    Num|Rate     Num
   ============================================================
   [tests/]
   version_test.py     | 0.0%      5|    -     0|    -      0
   ============================================================
                   Total:| 0.0%      5|    -     0|    -      0
   

🔥 Exception or Error

When running the initial command, the following error is observed:

lcov: ERROR: no valid records found in tracefile bazel-out/_coverage/_coverage_report.dat
(use "lcov --ignore-errors empty ..." to bypass this error)