Fix #7364: autosummary: crashed when autosummary_generate is False

CHANGES

@@ -16,6 +16,8 @@ Features added
 Bugs fixed
 ----------
 
+* #7364: autosummary: crashed when :confval:`autosummary_generate` is False
+
 Testing
 --------
 

sphinx/ext/autosummary/__init__.py

@@ -722,6 +722,8 @@ def process_generate_options(app: Sphinx) -> None:
         env = app.builder.env
         genfiles = [env.doc2path(x, base=None) for x in env.found_docs
                     if os.path.isfile(env.doc2path(x))]
+    elif genfiles is False:
+        pass
     else:
         ext = list(app.config.source_suffix)
         genfiles = [genfile + (ext[0] if not genfile.endswith(tuple(ext)) else '')