Test on Python 3.14 (#12978)

Author: AA-Turner

.github/workflows/main.yml

@@ -70,7 +70,6 @@ jobs:
         PYTHONWARNINGS: "error"  # treat all warnings as errors
 
   deadsnakes:
-    if: false
     runs-on: ubuntu-latest
     name: Python ${{ matrix.python }} (Docutils ${{ matrix.docutils }})
     strategy:
@@ -95,6 +94,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        sed -i 's/flit_core>=3.7/flit_core @ git+https:\/\/github.com\/pypa\/flit.git#subdirectory=flit_core/' pyproject.toml
         python -m pip install .[test]
     - name: Install Docutils ${{ matrix.docutils }}
       run: python -m pip install --upgrade "docutils~=${{ matrix.docutils }}.0"
@@ -104,7 +104,6 @@ jobs:
         PYTHONWARNINGS: "error"  # treat all warnings as errors
 
   deadsnakes-free-threraded:
-    if: false
     runs-on: ubuntu-latest
     name: Python ${{ matrix.python }} (Docutils ${{ matrix.docutils }}; free-threaded)
     strategy:
@@ -130,6 +129,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        sed -i 's/flit_core>=3.7/flit_core @ git+https:\/\/github.com\/pypa\/flit.git#subdirectory=flit_core/' pyproject.toml
         python -m pip install .[test]
     - name: Install Docutils ${{ matrix.docutils }}
       run: python -m pip install --upgrade "docutils~=${{ matrix.docutils }}.0"

pyproject.toml

@@ -34,6 +34,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Framework :: Sphinx",

sphinx/util/inspect.py

@@ -727,6 +727,10 @@ def _evaluate_forwardref(
     localns: dict[str, Any] | None,
 ) -> Any:
     """Evaluate a forward reference."""
+    if sys.version_info[:2] >= (3, 14):
+        # https://docs.python.org/dev/library/annotationlib.html#annotationlib.ForwardRef.evaluate
+        # https://docs.python.org/dev/library/typing.html#typing.evaluate_forward_ref
+        return typing.evaluate_forward_ref(ref, globals=globalns, locals=localns)
     if sys.version_info >= (3, 12, 4):
         # ``type_params`` were added in 3.13 and the signature of _evaluate()
         # is not backward-compatible (it was backported to 3.12.4, so anything

sphinx/util/typing.py

@@ -425,6 +425,9 @@ def stringify_annotation(
     annotation_module: str = getattr(annotation, '__module__', '')
     annotation_name: str = getattr(annotation, '__name__', '')
     annotation_module_is_typing = annotation_module == 'typing'
+    if sys.version_info[:2] >= (3, 14) and isinstance(annotation, ForwardRef):
+        # ForwardRef moved from `typing` to `annotationlib` in Python 3.14.
+        annotation_module_is_typing = True
 
     # Extract the annotation's base type by considering formattable cases
     if isinstance(annotation, TypeVar) and not _is_unpack_form(annotation):

tests/test_extensions/test_ext_autodoc.py

@@ -1588,6 +1588,14 @@ def _preamble_args(functional_constructor: bool = False):
         * Look an enum member (valid only if the enum has members)
         * Create a new enum class (functional API)
         """
+        if sys.version_info[:2] >= (3, 14):
+            if functional_constructor:
+                return (
+                    '(new_class_name, /, names, *, module=None, '
+                    'qualname=None, type=None, start=1, boundary=None)'
+                )
+            else:
+                return '(*values)'
         if sys.version_info[:2] >= (3, 13) or sys.version_info[:3] >= (3, 12, 3):
             if functional_constructor:
                 return (

tests/test_extensions/test_ext_autodoc_configs.py

@@ -10,6 +10,11 @@
 
 from tests.test_extensions.autodoc_util import do_autodoc
 
+skip_py314_segfault = pytest.mark.skipif(
+    sys.version_info[:2] >= (3, 14),
+    reason='Segmentation fault: https://github.com/python/cpython/issues/125017',
+)
+
 IS_PYPY = platform.python_implementation() == 'PyPy'
 
 
@@ -182,6 +187,7 @@ def test_autodoc_class_signature_separated_init(app):
     ]
 
 
+@skip_py314_segfault
 @pytest.mark.sphinx('html', testroot='ext-autodoc')
 def test_autodoc_class_signature_separated_new(app):
     app.config.autodoc_class_signature = 'separated'
@@ -365,6 +371,7 @@ def test_autodoc_inherit_docstrings_for_inherited_members(app):
     ]
 
 
+@skip_py314_segfault
 @pytest.mark.sphinx('html', testroot='ext-autodoc')
 def test_autodoc_docstring_signature(app):
     options = {'members': None, 'special-members': '__init__, __new__'}

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 4.2.0
-envlist = py{311,312,313}
+envlist = py{311,312,313,314}
 
 [testenv]
 usedevelop = True
@@ -19,7 +19,7 @@ passenv =
     BUILDER
     READTHEDOCS
 description =
-    py{311,312,313}: Run unit tests against {envname}.
+    py{311,312,313,314}: Run unit tests against {envname}.
 extras =
     test
 setenv =