[BUG] Repeated API Error 400

[shaunc]

Environment

• Platform (select one):
  • [x] Anthropic API
  • [ ] AWS Bedrock
  • [ ] Google Vertex AI
  • [ ] Other:
• Claude CLI version: 1.0.16
• Operating System: Ubuntu 22.04
• Terminal: bash in vscode

Bug Description

I am getting an API error -- no matter what I type. Here is the last thing I typed:

> I had just asked you to create extensive documentation, as this was a tricky 
  issue. Read the mathematical background and the test design / analysis framework 
  carefully, then write documentation on how we tuned, and also user documentation 
  on how to select # of banks, configure, etc.
  ⎿ API Error: 400 
    {"type":"error","error":{"type":"invalid_request_error","message":"messages.17: 
    `tool_use` ids were found without `tool_result` blocks immediately after: 
    toolu_015REhjCAk7wvjVLAxx4tABq. Each `tool_use` block must have a corresponding 
    `tool_result` block in the next message."}}

Steps to Reproduce

This happened in the middle of a session. When I stopped and restarted (without continue), I still got the same error after two interactions. However, in another window, I was able to restart, and now running for 5 minutes.

Expected Behavior

Actual Behavior

Additional Context

[tuxfamily]

Same "API Error: 400" issue here for the past few hours - my session was stuck on this message:

{"type":"error","error":{"type":"invalid_request_error","message":"messages.24: `tool_use` ids were found without `tool_result` blocks immediately after:
     toolu_01Pn2u37FXKwa9APpMnRdGmA. Each `tool_use` block must have a corresponding `tool_result` block in the next message."}}

I tried disabling MCP in case that was the issue, but that wasn't it.

My solution to bypass this error was to NOT use the "--continue" switch when calling Claude.

So I'm guessing it was related to the context/history of the (resumed) session.

[svenmeys]

Same issue here:

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.23: `tool_use` ids were found without `tool_result` blocks immediately after: toolu_01HBZnK6MJEZ9phH3UhKGvyc. Each `tool_use` block must have a corresponding 
     `tool_result` block in the next message."}}

--continue doesnt work, will try with a new session

[bdmorin]

Happening here too.

[github-actions[bot]]

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