{
  "description": "Combines multiple failure modes: truncated EOF, missing MediaBox, integer overflow, circular ref",
  "expected_diagnostics": [
    {
      "code": "STRUCT_MISSING_KEY",
      "min_count": 1,
      "description": "Page 1 missing MediaBox"
    },
    {
      "code": "STRUCT_OVERFLOW",
      "min_count": 1,
      "description": "Integer overflow in /Length"
    },
    {
      "code": "CIRCULAR_REFERENCE",
      "min_count": 1,
      "description": "Circular reference on page 2"
    }
  ],
  "expected_pages": "at least 1",
  "expected_behavior": "no panic, recovery continues"
}