case_id,downstream,downstream_version,source,library,old_version,new_version,expected,tests_before,tests_after,notes
C01_requests-toolbelt,requests-toolbelt,0.10.1,sdist,urllib3,1.26.15,2.0.7,break,161/0/0,0/0/23,"py3.11; extra test deps betamax trustme pyopenssl ndg-httpsclient; requests resolved to latest in both. 11 skipped before (incl. 8 skip + 3 xfail). After: every test module fails at collection because _compat.py imports urllib3.contrib.appengine. Tests replay Betamax cassettes (no live network). Unmasked probe found 6 more 'other' failures (Betamax replay vs urllib3 2 content-length enforcement), see masked.csv."
C02_pandas_schema,pandas-schema,0.3.6,sdist,pandas,1.5.3,2.0.3,break,65/2/0,64/3/0,py3.11; numpy<2 pinned in both (pandas 1.5.3 wheels are built against numpy 1.x). test_example.py (2 tests) fails in both venvs because example/ scripts are not shipped in the sdist.
C03_flask-sqlalchemy,Flask-SQLAlchemy,2.5.1,sdist,flask,2.2.5,3.0.0,break,72/1/0,0/0/1,"py3.11; SQLAlchemy==1.4.54 pinned in both. Before also pins werkzeug==2.2.3 (Flask 2.2.5 has no upper bound and breaks on Werkzeug 3); after resolves werkzeug 3.x as Flask 3.0.0 requires, so werkzeug also moves. After: tests/conftest.py import of flask_sqlalchemy fails, pytest exits rc=4 with no junit (all 72 count as regressions). 1 before failure = warnings-count assertion."
C04_flask-login,Flask-Login,0.6.2,sdist,werkzeug,2.3.7,3.0.0,break,98/15/0,0/0/1,"py3.11; Flask==2.3.3 pinned in both (needs Werkzeug>=2.3.7). 15 before failures come from Flask-Login's filterwarnings=error config tripping on Werkzeug 2.3 deprecation warnings (cookie_jar, url_decode, server_name), so they are excluded from regressions. After: tests/test_login.py fails at import (flask_login/utils.py:14)."
C05_dataset,dataset,1.5.2,git tag 1.5.2 (github.com/pudo/dataset),sqlalchemy,1.4.54,2.0.36,break,54/5/0,0/59/0,"py3.11; git tag used because the sdist lacks test/sample_data.py (package code is identical to the sdist). dataset 1.5.2 declares sqlalchemy>=1.3.2 with no cap. alembic resolved 1.19.2/1.20.0. 5 before failures are baseline. All 54 regressions stop at database.py:109; iterative probe found 9 more masked SQLAlchemy 2.0 API breaks, see masked.csv."
C06_lmfit,lmfit,1.2.2,sdist,numpy,1.26.4,2.0.2,break,651/5/0,273/361/22,"py3.11; extra test deps matplotlib emcee dill numdifftools; scipy/pandas resolved to numpy-2-compatible latest in both; numdifftools resolved differently (0.9.42 vs 0.11.1). 15 skipped in both. 378 regressions, all traced to np.asfarray (incl. 5 shgo tests that fail downstream and pass once asfarray is shimmed, and a brute(workers) test that fails in a subprocess). Runtime about 3 min before."
C07_jinjasql,jinjasql,0.1.8,git tag v0.1.8 (github.com/sripathikrishnan/jinjasql),jinja2,3.0.3,3.1.2,break,11/3/1,0/0/2,py3.11; git tag used because the sdist ships no tests (package identical to the sdist). Django tests (tests/test_django.py) not run because Django<1.8 is not installable on py3.11. Before: 3 failures + 1 error (helper named test_function collected as a test; Markup params with MarkupSafe 3.x) are baseline. After: collection fails at core.py:6; probe shows masked jinja2.ext.autoescape at core.py:167.
C08_marshmallow-jsonschema,marshmallow-jsonschema,0.13.0,git commit 138ac83 (release 0.13.0; no tag upstream),marshmallow,3.14.1,4.0.0,break,63/0/0,0/0/5,"py3.11; extra test deps jsonschema marshmallow-enum marshmallow-union setuptools<70 (marshmallow 3.14 imports pkg_resources). Package identical to the 0.13.0 sdist (which has no tests). After: all 5 test modules fail at import (base.py:11, private marshmallow.utils._Missing). Probe shows masked Field.default attribute reads and test-code default= kwargs."
C09_click-repl,click-repl,0.1.6,git tag 0.1.6 (github.com/click-contrib/click-repl),click,6.7,8.0.4,break,3/0/0,0/0/3,"py3.11; prompt_toolkit==2.0.10 pinned in both (tests fail with prompt_toolkit 3). Old version is click 6.7 because the 0.1.6 tests assume underscore command names (click 7.0 changed these to dashes), so the jump spans 7.x and 8.0. After: import of private module click._bashcomplete (removed in 8.0) fails. Probe also shows a masked 'other' (dash-name behaviour)."
C10_flask_control,Flask,2.0.3,sdist,jinja2,3.0.3,3.1.2,control,473/4/0,473/4/0,"py3.11; werkzeug==2.0.3 and pytest==7.1.3 pinned in both (conftest imports _pytest.monkeypatch.notset); asgiref blinker greenlet python-dotenv. Flask's own filterwarnings=error applies. Same 4 failures in both (e.g. test_click_7_deprecated with newer click). 2 skipped. Jinja2 3.1 removed Markup/escape/contextfunction etc., none of which Flask 2.0.3 uses: no regressions."
C11_click-default-group_control,click-default-group,1.2.2,git tag v1.2.2 (github.com/click-contrib/click-default-group),click,7.0,8.0.4,control,7/0/0,6/1/0,"py3.11; single-module package that subclasses click.Group. No API breakage, but 1 test regresses because click 8.0 capitalised the error message ('No such option'), which breaks a case-sensitive string assertion in test.py (category other)."
C12_numdifftools_control,numdifftools,0.9.41,sdist,numpy,1.26.4,2.0.2,control,120/11/0,120/11/0,py3.11; build needs setuptools<70 (setup.py uses pkg_resources); extra test deps hypothesis matplotlib algopy line_profiler (algopy resolved 0.6.1/0.7.2). Same 11 failures in both (newer scipy/line_profiler vs a 2022 release). 3 skipped. No regressions.