[BUG] /usr/bin/bash: -c: line 1: unexpected EOF while looking for matching `''

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?

Every bash command fails with:

/usr/bin/bash: -c: line 1: unexpected EOF while looking for matching ''`

Even echo "hello" fails. No commands execute at all.

Broken: 2.1.49
Working: 2.1.42
OS: Windows 11, also reproduced on macOS
Note: Windows machine has an apostrophe in the user path (C:\Users\USER'S) but Mac does not, so it's not path-related

What Should Happen?

Bash commands should execute normally. Even simple commands like echo "hello" fail.

Error Messages/Logs

/usr/bin/bash: -c: line 1: unexpected EOF while looking for matching `''
/usr/bin/bash: -c: line 1: unexpected EOF while looking for matching `''

Steps to Reproduce

1. Install Claude Code 2.1.49
2. Open any project in VS Code with Claude Code extension
3. Ask Claude to run any bash command (e.g. "run echo hello")
4. Every command fails with the matching `'' error
5. Downgrading to 2.1.42 fixes it

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.42

Claude Code Version

2.1.49

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

Also reproduced on macOS. The bug was introduced somewhere between 2.1.42 and 2.1.49.