{
  "description": "/BBox value 99999999999999999 overflows i32",
  "expected_diagnostics": [
    {
      "code": "STRUCT_OVERFLOW",
      "min_count": 1,
      "description": "Integer overflow in /BBox value should emit diagnostic"
    }
  ],
  "expected_behavior": "value clamped to i32::MAX, no panic"
}