Unexpectedly missing coverage + strange report format (PyPy3 7.1.1)

[vytas7]

Describe the bug
Coverage is reportedly missing on one line.
Moreover, that line is reported using a strange format, just: -96.
The mentioned line 96 is whitespace, FWIW.
The summary docs don't provide any similar example wrt the observed format.

To Reproduce
Run tox for this pull request on PyPy3 7.1.1: vytas7/falcon-sqla#4.
Reproduced thrice by rerunning the job.
This is the original failure: https://travis-ci.org/vytas7/falcon-sqla/jobs/654144248#L285

Expected behavior
Expected 100% coverage.
If there was a bug in the code and/or the test suite, expecting to get a clear indication what was not covered.

[nedbat]

Hmm, that is weird. The PyPy version in particular on Travis is pypy3.6-7.1.1 . I'll try reproducing this myself.

[vytas7]

FWIW, we've resolved this by retargeting to PyPy 7.2.0 found on Travis Ubuntu 18.04. 7.3.0 is unavailable in Travis OoB but everything passes in the pypy:3 Docker image as well.

The only question remaining I guess is whether this is a pure PyPy bug, or it reveals any edge case in coveragepy as well.

[nedbat]

Thanks for the interesting bug!

Fixed (for PyPy 7.1) in 6f4c0dc

[nedbat]

This is now available in coverage v5.0.4