From e759d3f939ccd09214845196d3f2f433bcfcb965 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Fri, 15 Dec 2023 15:24:30 +0200
Subject: [PATCH] gh-61648: Detect line numbers of properties in doctests
 (GH-113161) (cherry picked from commit
 8f8f0f97e126db9ca470fd7e7b2944c150db6305)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
---
 Lib/doctest.py                                   |  2 ++
 Lib/test/doctest_lineno.py                       | 16 ++++++++++++++++
 Lib/test/test_doctest.py                         |  2 ++
 ...2023-12-15-12-35-28.gh-issue-61648.G-4pz0.rst |  1 +
 4 files changed, 21 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2023-12-15-12-35-28.gh-issue-61648.G-4pz0.rst

diff --git a/Lib/doctest.py b/Lib/doctest.py
index 5012b24b98a339..fc9ec65805346e 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -1114,6 +1114,8 @@ def _find_lineno(self, obj, source_lines):
 
         # Find the line number for functions & methods.
         if inspect.ismethod(obj): obj = obj.__func__
+        if isinstance(obj, property):
+            obj = obj.fget
         if inspect.isfunction(obj) and getattr(obj, '__doc__', None):
             # We don't use `docstring` var here, because `obj` can be changed.
             obj = obj.__code__
diff --git a/Lib/test/doctest_lineno.py b/Lib/test/doctest_lineno.py
index 729a68aceaa990..677c569cf710eb 100644
--- a/Lib/test/doctest_lineno.py
+++ b/Lib/test/doctest_lineno.py
@@ -49,5 +49,21 @@ def method_with_doctest(self):
         'method_with_doctest'
         """
 
+    @classmethod
+    def classmethod_with_doctest(cls):
+        """
+        This has a doctest!
+        >>> MethodWrapper.classmethod_with_doctest.__name__
+        'classmethod_with_doctest'
+        """
+
+    @property
+    def property_with_doctest(self):
+        """
+        This has a doctest!
+        >>> MethodWrapper.property_with_doctest.__name__
+        'property_with_doctest'
+        """
+
 # https://github.com/python/cpython/issues/99433
 str_wrapper = object().__str__
diff --git a/Lib/test/test_doctest.py b/Lib/test/test_doctest.py
index 6c0da0b156a5d2..71e8841533142c 100644
--- a/Lib/test/test_doctest.py
+++ b/Lib/test/test_doctest.py
@@ -673,9 +673,11 @@ def basics(): r"""
        30  test.doctest_lineno.ClassWithDoctest
      None  test.doctest_lineno.ClassWithoutDocstring
      None  test.doctest_lineno.MethodWrapper
+       53  test.doctest_lineno.MethodWrapper.classmethod_with_doctest
        39  test.doctest_lineno.MethodWrapper.method_with_docstring
        45  test.doctest_lineno.MethodWrapper.method_with_doctest
      None  test.doctest_lineno.MethodWrapper.method_without_docstring
+       61  test.doctest_lineno.MethodWrapper.property_with_doctest
         4  test.doctest_lineno.func_with_docstring
        12  test.doctest_lineno.func_with_doctest
      None  test.doctest_lineno.func_without_docstring
diff --git a/Misc/NEWS.d/next/Library/2023-12-15-12-35-28.gh-issue-61648.G-4pz0.rst b/Misc/NEWS.d/next/Library/2023-12-15-12-35-28.gh-issue-61648.G-4pz0.rst
new file mode 100644
index 00000000000000..c841e5c7f7683a
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-12-15-12-35-28.gh-issue-61648.G-4pz0.rst
@@ -0,0 +1 @@
+Detect line numbers of properties in doctests.