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A /Font entry can point at an object that is nothing but a reference to another (ISO 32000-1 7.3.10). The fonts something draws with were recorded by the entry's own reference, so the font dictionary at the end of such a chain went unchecked. Follow the chain, as resolve does, up to 32 references. (CodeRabbit review on #6172.) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Pq7HyDBXygTf7jcqdsjcfn