'tox -e coverage' is failing

[tseaver]

@dataflake, @icemac either of you understand this failure?

$ git status
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean
$ git log -1
commit ec5f1a02896da407da3860b82949aa70805f26d2 (HEAD -> master, origin/master, origin/HEAD)
Merge: a522866f 4a680bbf
Author: Jens Vagelpohl <jens@plyp.com>
Date:   Sat May 25 08:43:45 2024 +0000

    Merge pull request #198 from zopefoundation/config-with-c-code-template-4dc0484e
    
    Update meta/config template to publish Windows wheels to PyP
$ .tox/coverage/bin/coverage run -m zope.testrunner --test-path=src -v
Running tests at level 1
Running zope.testrunner.layer.UnitTests tests:
  Set up zope.testrunner.layer.UnitTests in 0.000 seconds.
  Running:
.......................................................................................................................................................................................................
 ...
...........................................................................................................................................................
  Ran 771 tests with 0 failures, 0 errors and 6 skipped in 0.518 seconds.
Tearing down left over layers:
  Tear down zope.testrunner.layer.UnitTests in 0.000 seconds.
...t/.tox/coverage/lib/python3.12/site-packages/coverage/control.py:888: CoverageWarning: No data was collected. (no-data-collected)
  self._warn("No data was collected.", slug="no-data-collected")

The apparent fix is to tweak .coveragerc as follows:

diff --git a/.coveragerc b/.coveragerc
index b102ff0a..87ec818d 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,7 +1,7 @@
 # Generated from:
 # https://github.com/zopefoundation/meta/tree/master/config/c-code
 [run]
-source = persistent
+source = src/persistent
 # New in 5.0; required for the GHA coveralls submission.
 relative_files = True
 branch = true

with (I assume) the equivalent tweak to .meta.toml to preserve the change:

diff --git a/.meta.toml b/.meta.toml
index 6297b125..e090600b 100644
--- a/.meta.toml
+++ b/.meta.toml
@@ -28,6 +28,7 @@ testenv-deps = [
 fail-under = 99.8
 
 [coverage-run]
+source = src/persistent
 additional-config = [
     "omit =",
     "     src/persistent/_ring_build.py",

I don't understand, though, why this is failing for persistent but not for e.g. BTrees or zodbpickle.

[dataflake]

I can't say much about .coveragerc, sorry