##### SUMMARY
Happened here: https://github.com/ansible-collections/community.general/pull/341

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
ansible-test

##### ANSIBLE VERSION
```paste below
devel
```

with CaptureStd():
            try:
                existing_doc, dummy_examples, dummy_return, existing_metadata = get_docstring(
                    self.base_module, fragment_loader, verbose=True, collection_name=self.collection_name, is_module=True)
                existing_options = existing_doc.get('options', {}) or {}
            except AssertionError:
                fragment = doc['extends_documentation_fragment']
                self.reporter.warning(
                    path=self.object_path,
                    code='missing-existing-doc-fragment',
                    msg='Pre-existing DOCUMENTATION fragment missing: %s' % fragment
                )
                return
            except Exception as e:
                self.reporter.warning_trace(
                    path=self.object_path,
                    tracebk=e
                )
                self.reporter.warning(
                    path=self.object_path,
                    code='unknown-doc-fragment',
                    msg=('Unknown pre-existing DOCUMENTATION error, see TRACE. Submodule refs may need updated')
                )
                return
        try:
            mod_collection_name = existing_doc.get('version_added_collection')
            mod_version_added = self._create_strict_version(
                str(existing_doc.get('version_added', '0.0')),
                collection_name=mod_collection_name)
        except ValueError: