mypy==0.991

setup.py

@@ -51,7 +51,19 @@ def find_version(*file_paths):
     package_data={"PyQt5-stubs": ['*.pyi']},
     packages=["PyQt5-stubs"],
     extras_require={
-        "dev": ["mypy==0.930", "pytest", "pytest-xvfb"],
+        "dev": [
+            # 0.940 introduced class finality testing that segfaults on PyQt5
+            #   https://github.com/python/mypy/commit/080bb0e04e9d5c4d2513621d1fb62f1d61a573e9
+            #   https://www.riverbankcomputing.com/pipermail/pyqt/2022-November/045068.html
+            # >= 0.990 for monkey patchable class finality check function
+            #   https://github.com/python/mypy/commit/55d757e4910a0ae73175a71f3c0f02caad53e059
+            "mypy==0.991; python_version >= '3.7'",
+            # 0.981 dropped 3.6 support
+            #   https://github.com/python/mypy/commit/dc118e293203863ab1007699b2cecf0f26ddfa22
+            "mypy<0.940; python_version < '3.7'",
+            "pytest",
+            "pytest-xvfb",
+        ],
     },
     classifiers=[
         "Development Status :: 5 - Production/Stable",

stubtest_wrapper.py

@@ -0,0 +1,44 @@
+# workaround for https://github.com/python/mypy/issues/14196
+
+import faulthandler
+import sys
+import typing
+
+import mypy.stubtest
+
+
+sentinel = object
+
+
+def noop_generator(*args, **kwargs) -> typing.Iterator[object]:
+    return
+    yield  # make it a generator as the original is
+
+
+def maybe_monkey_patch(object_: object, name: str, replacement: object) -> None:
+    attribute = getattr(object_, name, sentinel)
+    if attribute is sentinel:
+        print(f"{name} does not exist on {object_}, skipping monkey patching")
+        return
+
+    setattr(object_, name, replacement)
+    print(f"{name} on {object_} monkey patched by {replacement}")
+    return
+
+
+def main() -> int:
+    maybe_monkey_patch(
+        object_=mypy.stubtest,
+        name="_verify_final",
+        replacement=noop_generator,
+    )
+
+    # make sure the messages get out since we're working around a segfault here
+    sys.stdout.flush()
+    # in case we still get a segfault, try to report it
+    faulthandler.enable()
+
+    return mypy.stubtest.main()
+
+
+sys.exit(main())

tox.ini

@@ -17,11 +17,10 @@ commands =
   pip install PyQt5==5.15.6 PyQt3D==5.15.5 PyQtChart==5.15.5 PyQtDataVisualization==5.15.5 PyQtNetworkAuth==5.15.5 PyQtPurchasing==5.15.5 PyQtWebEngine==5.15.5
   pip freeze --all
   mypy --show-error-codes -p PyQt5-stubs
-  stubtest --allowlist {toxinidir}/{env:ALLOWLIST} --allowlist {toxinidir}/stubtest.allowlist.to_review --allowlist {toxinidir}/stubtest.allowlist.{env:OS_MARKER} PyQt5
+  python {toxinidir}/stubtest_wrapper.py --allowlist {toxinidir}/{env:ALLOWLIST} --allowlist {toxinidir}/stubtest.allowlist.to_review --allowlist {toxinidir}/stubtest.allowlist.{env:OS_MARKER} PyQt5
   pytest --capture=no --verbose {posargs}
 
 [pytest]
 addopts = --strict-markers
 testpaths = tests
 xfail_strict = true
-