[BUG] Error: Timeout waiting after 1000ms in claude-code CLI (Node.js v20.19.3)

[felixg3]

Environment

• Platform (select one):
  • [x] Anthropic API
  • [ ] AWS Bedrock
  • [ ] Google Vertex AI
  • [ ] Other:
• Claude CLI version: 1.0.31 (Claude Code)
• Operating System: macOS 15.5
• Terminal: VSCode

Bug Description

node:internal/process/promises:391
    triggerUncaughtException(err, true /* fromPromise */);
    ^

Error: Timeout waiting after 1000ms
    at FC2 (.../cli.js:1366:11718)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async nF5 (.../cli.js:1979:9952)
    at async F (.../cli.js:1979:8806)

Steps to Reproduce

1.	Install Node.js 20.19.3 (e.g. via n)
2.	Install @anthropic-ai/claude-code globally
3.	Run any Claude Code command (e.g. claude -p "<your-prompt>")
4.	Wait ~1–2 minutes
5.	Observe crash with the above stack trace

⸻

Expected Behavior

•	No uncaught exceptions
•	CLI should retry or extend timeout if the Claude API takes longer than 1000ms
•	Graceful failure or logging without process crash

⸻

Actual Behavior

•	Process crashes during promise resolution
•	Error originates from triggerUncaughtException in node:internal/process/promises
•	The default timeout of 1000ms seems insufficient under regular network/load conditions

⸻

Additional Context

Troubleshooting Done • Verified Node version: node -v → v20.19.3 • Confirmed the crash is intermittent but reproducible under normal CLI usage • No relevant environment variables (e.g. BASH_DEFAULT_TIMEOUT_MS) were customized • Homebrew node v24 was unlinked to ensure clean Node environment

[AI-Guru]

Same here. Makes Claude Code unusable.

[AI-Guru]

So far, this has happened only inside VSCode. Not in a regular terminal.

[sergenX1]

happening in Cursor when using the extension and via terminal within Cursor and very annoying

[evdutt]

Getting this error when asking Claude in VSCode terminal to make a Jupyter notebook exploring a CSV dataset. It makes the notebook but before I can press 1 to accept, it crashes with the above error. Seems that getting stuck on one task (not iterating or moving down a todo list) for more than two minutes is related. Tried exact same prompt in the same codebase in a standalone (not VSCode) terminal and it worked just fine. I am also on Mac, using Python and Node installed via Homebrew.

[glitchculture]

Seems similar to this issue (Mac, Claude CLI run in VS Code terminal). I posted a workaround here: https://github.com/anthropics/claude-code/issues/2547

[evdutt]

Seems similar to this issue (Mac, Claude CLI run in VS Code terminal). I posted a workaround here: https://github.com/anthropics/claude-code/issues/2547

Interesting. Jupyter notebooks have markdown in them which would explain why I was having that issue.

[felixg3]

Seems similar to this issue (Mac, Claude CLI run in VS Code terminal). I posted a workaround here: https://github.com/anthropics/claude-code/issues/2547

Interesting. Jupyter notebooks have markdown in them which would explain why I was having that issue.

correct i was using jupyter

[Jenosize]

I’m hitting the same 1000 ms timeout crash.

Environment

• Claude Code CLI: v1.0.31
• Node.js: v20.19.3 (installed via n, Homebrew Node unlinked)
• macOS: 15.5 (Apple Silicon)
• Terminal: VS Code integrated terminal

[yuji-yasuno]

I have the same issue; Claude crashes crashes at the same point every time I create it when creating Jupyter Notebook.

Environment

Claude Code CLI: v1.0.35 Node.js: v22.14 (using nodenv installed via anyenv) macOS: 15.5 (Apple Silicon) Terminal: VS Code and Cursor

[Orchid420]

@bcherny please help

[mcbeaker]

Claude crashes after planning to edit an md file

node:internal/process/promises:394 triggerUncaughtException(err, true /* fromPromise */); ^

Error: Timeout waiting after 1000ms at wC2 (file:///usr/local/lib/node_modules/@anthropic-ai/claude-code/cli.js:1368:11718) at process.processTicksAndRejections (node:internal/process/task_queues:105:5) at async nF5 (file:///usr/local/lib/node_modules/@anthropic-ai/claude-code/cli.js:1929:11635) at async F (file:///usr/local/lib/node_modules/@anthropic-ai/claude-code/cli.js:1929:10489)

Node.js v24.3.0 macOS:15.4 (intel) Terminal: VS Code

[scottwritescode]

This same issue popped up for me and I realized I had recently turn on VSCode's ability to always open Markdown files in "Preview", not the markdown text.

Breaking VSCode settings.json setting

    "workbench.editorAssociations": {   
        "*.md": "vscode.markdown.preview.editor",
    }   

Removing this block from the settings file - (turning off "Automatically open markdown files in preview mode") - fixed the issue for me.

[siri666666]

same node:internal/process/promises:394 triggerUncaughtException(err, true /* fromPromise */); ^

Error: Timeout waiting after 1000ms at UN2 (file:///root/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1372:13682) at process.processTicksAndRejections (node:internal/process/task_queues:105:5) at async oL6 (file:///root/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1948:11756) at async J (file:///root/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1948:10610)

Node.js v24.3.0