sphinx-doc__sphinx-7462

`IndexError: pop from empty list` for empty tuple type annotation

Verdict: the fix is stated in the issue (Tier A).

Changing https://github.com/sphinx-doc/sphinx/blob/b3e26a6c851133b82b50f4b68b53692076574d13/sphinx/domains/python.py#L117-L122 to ```python if node.elts: result = [] for elem in node.elts: result.extend(unparse(elem)) result.append(addnodes.desc_sig_punctuation('', ', ')) result.pop() else: result = [addnodes.desc_sig_punctuation('', '('), addnodes.desc_sig_punctuation('', ')')] return result ```

The text states the fix: “Changing https://github.com/sphinx-doc/sphinx/blob/b3e26a6c851133b82b50f4b68b53692076574d13/sphinx/domains/python.py#L117-L122 to ```python if node.elts: result = [] for…”

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