[BUG] Claude code CLI no longer works, crashes on startup

[garyo]

Environment

• Platform (select one):
  • [ ] Anthropic API
  • [ ] AWS Bedrock
  • [ ] Google Vertex AI
  • [X] Other: MacOS
• Claude CLI version: latest, but can't run claude to find out
• Operating System: MacOS 15.3
• Terminal: Terminal App

Bug Description

Something I added or changed caused claude code to stop working but not sure what. To fix it, I uninstalled claude code and reinstalled with bun install --global claude but I still get errors on startup.

Steps to Reproduce

1. bun install --global claude

% ~/.bun/bin/claude 
file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:277
... lots of code dump...
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
TypeError: Cannot read properties of undefined (reading 'prototype')
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:277:25482
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:13:402
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:277:25601
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:13:402
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:279:3206
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:13:402
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:279:6228
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:13:402
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:279:7433
    at file:///Users/garyo/.bun/install/global/node_modules/@anthropic-ai/claude-code/cli.js:13:402

Node.js v24.0.0
%

Expected Behavior

Expect it to give me a prompt and work normally

Actual Behavior

Crashes with above error.

Additional Context

I tried removing my claude config (incl ~/Library/Application Support/claude) and uninstalling everything I could find claude-related, but no joy. It might be related to the fact that I tried aider -- I'm not sure how to remove that. I installed it via uvx aider-install, but it seems to be all python so perhaps that's unrelated.

[bcherny]

Hi! Does it work if you install using NodeJS, rather than Bun? npm i -g @anthropic-ai/claude-code.

[garyo]

No, same symptom, sorry.

[ant-kurt]

Hi @garyo, there is a known issue with Node 24.0.0. Upgrading to 24.0.1 or later should resolve this.

See https://github.com/anthropics/claude-code/issues/1291.

[garyo]

Confirmed, works fine with node 24.1.0. Thanks!

[github-actions[bot]]

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