"""Cross-file callee that returns a fixed integer — the summary's `return_abstract` baseline already captures `exact(42)` (an abstract- interpretation intrinsic fact) and the abstract transfer channel attaches it as a per-parameter `Clamped` transfer so the caller synthesises the same bound through the summary path. This is the baseline-invariant variant (Clamped), as distinct from the Identity variant covered by the sibling fixtures. """ def safe_index(): return 42