[BUG] Unable to copy `%PDF-1.6` text

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?

One of my outputs contained this line:

2. Decoded to disk — exactly 1945 bytes, valid `%PDF-1.6` header and `%%EOF` trailer (integrity check passed).

When I did /copy or I manually selected it (in flicker-free mode) it would NOT copy to my clipboard. In fact the clipboard became empty. So anything that was in there, was removed.

I can manually select & copy anything _before_ and _after_ the %PDF-1.6 text, but if it includes it the copy will not work.

What Should Happen?

It should just copy it into the clipboard

Error Messages/Logs

No errors

Steps to Reproduce

Have that line in your output, try to copy it, fail

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.158

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_