Fix sphinx-doc#8085: autodoc: AttributeError is raised on documenting…

… an attribute

Until Python 3.5.2, typing.get_type_hints() raises AttributeError if
given object does not have `__code__` attribute.  This handles the
exception not to crash building documents.

refs: python/cpython@991d14f

CHANGES

@@ -40,6 +40,8 @@ Bugs fixed
 * #8074: napoleon: Crashes during processing C-ext module
 * #8084: autodoc: KeyError is raised on documenting an attribute of the broken
   class
+* #8085: autodoc: AttributeError is raised on documenting an attribute on Python
+  3.5.2
 
 Testing
 --------

sphinx/ext/autodoc/__init__.py

@@ -1613,6 +1613,9 @@ def add_directive_header(self, sig: str) -> None:
             except KeyError:
                 # a broken class found (refs: https://github.com/sphinx-doc/sphinx/issues/8084)
                 annotations = {}
+            except AttributeError:
+                # AttributeError is raised on 3.5.2 (fixed by 3.5.3)
+                annotations = {}
 
             if self.objpath[-1] in annotations:
                 objrepr = stringify_typehint(annotations.get(self.objpath[-1]))
@@ -1986,6 +1989,9 @@ def add_directive_header(self, sig: str) -> None:
             except KeyError:
                 # a broken class found (refs: https://github.com/sphinx-doc/sphinx/issues/8084)
                 annotations = {}
+            except AttributeError:
+                # AttributeError is raised on 3.5.2 (fixed by 3.5.3)
+                annotations = {}
 
             if self.objpath[-1] in annotations:
                 objrepr = stringify_typehint(annotations.get(self.objpath[-1]))