add exception spec to pytest_fixture_post_finalizer hook

src/_pytest/fixtures.py

@@ -1023,17 +1023,23 @@ class FixtureDef(Generic[FixtureValue]):
             except BaseException as e:
                 exceptions.append(e)
         node = request.node
-        node.ihook.pytest_fixture_post_finalizer(fixturedef=self, request=request)
+        if len(exceptions) == 1:
+            final_exception = exceptions[0]
+        elif len(exceptions) > 1:
+            msg = f'errors while tearing down fixture "{self.argname}" of {node}'
+            final_exception = BaseExceptionGroup(msg, exceptions[::-1])
+        else:
+            final_exception = None
+        node.ihook.pytest_fixture_post_finalizer(
+            fixturedef=self, request=request, exception=final_exception
+        )
         # Even if finalization fails, we invalidate the cached fixture
         # value and remove all finalizers because they may be bound methods
         # which will keep instances alive.
         self.cached_result = None
         self._finalizers.clear()
-        if len(exceptions) == 1:
+        if final_exception:
-            raise exceptions[0]
+            raise final_exception
-        elif len(exceptions) > 1:
-            msg = f'errors while tearing down fixture "{self.argname}" of {node}'
-            raise BaseExceptionGroup(msg, exceptions[::-1])
 
     def execute(self, request: SubRequest) -> FixtureValue:
         """Return the value of this fixture, executing it if not cached."""

src/_pytest/hookspec.py

@@ -861,7 +861,9 @@ def pytest_fixture_setup(
 
 
 def pytest_fixture_post_finalizer(
-    fixturedef: "FixtureDef[Any]", request: "SubRequest"
+    fixturedef: "FixtureDef[Any]",
+    request: "SubRequest",
+    exception: "BaseException | None",
 ) -> None:
     """Called after fixture teardown, but before the cache is cleared, so
     the fixture result ``fixturedef.cached_result`` is still available (not
@@ -871,6 +873,8 @@ def pytest_fixture_post_finalizer(
         The fixture definition object.
     :param request:
         The fixture request object.
+    :param exception:
+        The list of exceptions received at the end of the fixtures.
 
     Use in conftest plugins
     =======================

testing/python/fixtures.py

@@ -4014,6 +4014,63 @@ def test_pytest_fixture_setup_and_post_finalizer_hook(pytester: Pytester) -> Non
     )
 
 
+def test_exceptions_in_pytest_fixture_setup_and_post_finalizer_hook(
+    pytester: Pytester,
+) -> None:
+    pytester.makeconftest(
+        """
+        import pytest
+        @pytest.hookimpl(hookwrapper=True)
+        def pytest_fixture_setup(fixturedef):
+            result = yield
+            print('SETUP EXCEPTION in {0}: {1}'.format(fixturedef.argname, result.exception))
+        def pytest_fixture_post_finalizer(fixturedef, exception):
+            print('TEARDOWN EXCEPTION in {0}: {1}'.format(fixturedef.argname, exception))
+    """
+    )
+    pytester.makepyfile(
+        **{
+            "tests/test_fixture_exceptions.py": """
+            import pytest
+
+            @pytest.fixture(scope='module')
+            def module_teardown_exeption():
+                yield
+                raise ValueError('exeption in module_teardown_exeption')
+
+            @pytest.fixture()
+            def func_teardown_exeption():
+                yield
+                raise ValueError('exeption in func_teardown_exeption')
+
+            @pytest.fixture()
+            def func_setup_exeption():
+                raise ValueError('exeption in func_setup_exeption')
+
+            @pytest.mark.usefixtures(
+                'module_teardown_exeption',
+                'func_teardown_exeption',
+                'func_setup_exeption',
+            )
+            def test_func():
+                pass
+        """,
+        }
+    )
+    result = pytester.runpytest("-s")
+    assert result.ret == 1
+    result.stdout.fnmatch_lines(
+        [
+            "*SETUP EXCEPTION in module_teardown_exeption: None*",
+            "*SETUP EXCEPTION in func_teardown_exeption: None*",
+            "*SETUP EXCEPTION in func_setup_exeption: exeption in func_setup_exeption*",
+            "*TEARDOWN EXCEPTION in func_setup_exeption: None*",
+            "*TEARDOWN EXCEPTION in func_teardown_exeption: exeption in func_teardown_exeption*",
+            "*TEARDOWN EXCEPTION in module_teardown_exeption: exeption in module_teardown_exeption*",
+        ]
+    )
+
+
 class TestScopeOrdering:
     """Class of tests that ensure fixtures are ordered based on their scopes (#2405)"""