[BUG] Crash on conversation resume: "null is not an object (evaluating 'q.split')" in diff renderer

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Resuming a conversation with claude --resume crashes immediately with null is not an object (evaluating 'q.split'). The crash is in the structured patch renderer (pl7) which calls originalFile.split('\n') without a null guard. When originalFile is null (e.g. for a newly created file or one that no longer exists on disk), .split() throws a TypeError and the CLI exits.

What Should Happen?

The conversation should resume and render previous tool results gracefully, even when the original file content is unavailable. A null-safe access (q?.split(...)) or guard should prevent the crash.

Error Messages/Logs

ERROR  null is not an object (evaluating 'q.split')

 pl7 (/$bunfs/root/src/entrypoints/cli.js:3163:2024)
 cX7 (cli.js:2603:45367)
 h9 → a1 → D7_ → nV_ → BQT → iV_ → X7_ → a_ (rendering pipeline)

Steps to Reproduce

Steps to Reproduce:

1. Start a Claude Code conversation that involves file edits (Write or Edit tool) 2. End the conversation 3. Run claude --resume to resume it 4. CLI crashes with the above error before rendering the conversation

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.81

Claude Code Version

2.1.83

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

Other

Additional Information

My terminal is Ghosty with fish shell