1 files changed, 8 insertions, 6 deletions
diff --git a/sphinx/util/rst.py b/sphinx/util/rst.py
index 1e8fd66..4e8fdee 100644
--- a/sphinx/util/rst.py
+++ b/sphinx/util/rst.py
@@ -5,11 +5,11 @@ from __future__ import annotations
 import re
 from collections import defaultdict
 from contextlib import contextmanager
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, cast
 from unicodedata import east_asian_width
 
 from docutils.parsers.rst import roles
-from docutils.parsers.rst.languages import en as english
+from docutils.parsers.rst.languages import en as english  # type: ignore[attr-defined]
 from docutils.parsers.rst.states import Body
 from docutils.utils import Reporter
 from jinja2 import Environment, pass_environment
@@ -18,7 +18,7 @@ from sphinx.locale import __
 from sphinx.util import docutils, logging
 
 if TYPE_CHECKING:
-    from collections.abc import Generator
+    from collections.abc import Iterator
 
     from docutils.statemachine import StringList
 
@@ -54,17 +54,18 @@ def textwidth(text: str, widechars: str = 'WF') -> int:
 def heading(env: Environment, text: str, level: int = 1) -> str:
     """Create a heading for *level*."""
     assert level <= 3
-    width = textwidth(text, WIDECHARS[env.language])
+    # ``env.language`` is injected by ``sphinx.util.template.ReSTRenderer``
+    width = textwidth(text, WIDECHARS[env.language])  # type: ignore[attr-defined]
     sectioning_char = SECTIONING_CHARS[level - 1]
     return f'{text}\n{sectioning_char * width}'
 
 
 @contextmanager
-def default_role(docname: str, name: str) -> Generator[None, None, None]:
+def default_role(docname: str, name: str) -> Iterator[None]:
     if name:
         dummy_reporter = Reporter('', 4, 4)
         role_fn, _ = roles.role(name, english, 0, dummy_reporter)
-        if role_fn:  # type: ignore[truthy-function]
+        if role_fn:
             docutils.register_role('', role_fn)  # type: ignore[arg-type]
         else:
             logger.warning(__('default role %s not found'), name, location=docname)
@@ -102,6 +103,7 @@ def append_epilog(content: StringList, epilog: str) -> None:
     if epilog:
         if len(content) > 0:
             source, lineno = content.info(-1)
+            lineno = cast(int, lineno)  # lineno will never be None, since len(content) > 0
         else:
             source = '<generated>'
             lineno = 0