[BUG]

Environment

• Platform (select one):
• Anthropic API
• AWS Bedrock
• Google Vertex AI
• Other:
• Claude CLI version: 1.0.60 (Claude Code)
• Operating System: Windows 11
• Terminal: Command Prompt/PowerShell

Bug Description

Claude Code crashes with "String not found in file. Failed to apply edit" error when attempting to edit a file using the Edit tool. The error occurs during file editing operations and
causes the entire CLI to terminate with an uncaught exception.

Steps to Reproduce

1. Use Claude Code to edit a file (in this case Korneev_Alexander_CV.md)
2. Attempt to apply an edit using the Edit tool
3. The edit fails with "String not found in file" error
4. CLI crashes with Node.js uncaught exception

Expected Behavior

When an edit fails due to string not being found, Claude Code should:

• Handle the error gracefully without crashing
• Provide clear feedback about why the edit failed
• Allow the user to continue the session

Actual Behavior

The CLI crashes completely with this error stack trace:
node:internal/process/promises:394
triggerUncaughtException(err, true / fromPromise /);
^

Error: String not found in file. Failed to apply edit.
at zx (file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1787:728)
at xV8 (file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2716:11114)
at J (file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2716:10092)
at file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2716:10358
at LF (file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:67:21533)
at HX (file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:67:41153)
at file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:67:39325
at mc1 (file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:61:78952)
at Immediate.xc1 [as _onImmediate] (file:///C:/Users/Inter/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:61:79371)
at process.processImmediate (node:internal/timers:485:21)

Node.js v22.17.1

Additional Context

• The error appears to be an unhandled promise rejection that should be caught and handled gracefully
• This affects user experience as it terminates the entire session
• The underlying edit failure might be valid (string not found), but the crash is not acceptable behavior