DoctTest line numbers not found due to method wrapping (#8861)

Closes #8796

AUTHORS

@@ -96,6 +96,7 @@ David Vierra
 Daw-Ran Liou
 Debi Mishra
 Denis Kirisov
+Denivy Braiam Rück
 Dhiren Serai
 Diego Russo
 Dmitry Dygalo

changelog/8796.bugfix.rst

@@ -0,0 +1 @@
+Fixed internal error when skipping doctests.

src/_pytest/doctest.py

@@ -504,12 +504,18 @@ class DoctestModule(pytest.Module):
 
             def _find_lineno(self, obj, source_lines):
                 """Doctest code does not take into account `@property`, this
-                is a hackish way to fix it.
+                is a hackish way to fix it. https://bugs.python.org/issue17446
 
-                https://bugs.python.org/issue17446
+                Wrapped Doctests will need to be unwrapped so the correct
+                line number is returned. This will be reported upstream. #8796
                 """
                 if isinstance(obj, property):
                     obj = getattr(obj, "fget", obj)
+
+                if hasattr(obj, "__wrapped__"):
+                    # Get the main obj in case of it being wrapped
+                    obj = inspect.unwrap(obj)
+
                 # Type ignored because this is a private function.
                 return super()._find_lineno(  # type:ignore[misc]
                     obj,

testing/test_doctest.py

@@ -1170,6 +1170,41 @@ class TestDoctestSkips:
             ["*4: UnexpectedException*", "*5: DocTestFailure*", "*8: DocTestFailure*"]
         )
 
+    def test_skipping_wrapped_test(self, pytester):
+        """
+        Issue 8796: INTERNALERROR raised when skipping a decorated DocTest
+        through pytest_collection_modifyitems.
+        """
+        pytester.makeconftest(
+            """
+            import pytest
+            from _pytest.doctest import DoctestItem
+
+            def pytest_collection_modifyitems(config, items):
+                skip_marker = pytest.mark.skip()
+
+                for item in items:
+                    if isinstance(item, DoctestItem):
+                        item.add_marker(skip_marker)
+            """
+        )
+
+        pytester.makepyfile(
+            """
+            from contextlib import contextmanager
+
+            @contextmanager
+            def my_config_context():
+                '''
+                >>> import os
+                '''
+            """
+        )
+
+        result = pytester.runpytest("--doctest-modules")
+        assert "INTERNALERROR" not in result.stdout.str()
+        result.assert_outcomes(skipped=1)
+
 
 class TestDoctestAutoUseFixtures: