[Bug] Anthropic API Error: Tool result block without corresponding tool use block

Resolved 💬 3 comments Opened Oct 30, 2025 by Steph501 Closed Nov 3, 2025

Bug Description
API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.148.content.0: unexpected tool_use_id found in tool_result blocks:
toolu_01F4kHU93xq5qMbzzXT3Dqpr. Each tool_result block must have a corresponding tool_use block in the previous message."},"request_id":"req_011CUdsfcNiERCLPoNP1JM4G"}

Environment Info

  • Platform: linux
  • Terminal: gnome-terminal
  • Version: 2.0.29
  • Feedback ID: 014f3e07-a17a-4e69-a1cc-8d3f18da34da

Errors

[{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at YD (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4413)\n    at file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4141\n    at Array.map (<anonymous>)\n    at MF (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4132)\n    at YTQ (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1797:6306)\n    at Vw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:73:19414)\n    at Io (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:42806)\n    at T9 (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38347)\n    at zc (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38275)\n    at Lw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38129)","timestamp":"2025-10-30T10:43:14.524Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at YD (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4413)\n    at file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4141\n    at Array.map (<anonymous>)\n    at MF (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4132)\n    at YTQ (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1797:6306)\n    at Vw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:73:19414)\n    at Io (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:42806)\n    at T9 (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38347)\n    at zc (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38275)\n    at Lw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38129)","timestamp":"2025-10-30T10:51:07.588Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at YD (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4413)\n    at file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4141\n    at Array.map (<anonymous>)\n    at MF (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4132)\n    at YTQ (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1797:6306)\n    at Vw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:73:19414)\n    at Io (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:42806)\n    at T9 (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38347)\n    at zc (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38275)\n    at Lw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38129)","timestamp":"2025-10-30T14:51:34.553Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at YD (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4413)\n    at file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4141\n    at Array.map (<anonymous>)\n    at MF (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4132)\n    at YTQ (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1797:6306)\n    at Vw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:73:19414)\n    at Io (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:42806)\n    at T9 (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38347)\n    at zc (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38275)\n    at Lw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:38129)","timestamp":"2025-10-30T14:51:34.564Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at YD (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4413)\n    at file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4141\n    at Array.map (<anonymous>)\n    at MF (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1175:4132)\n    at YTQ (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:1797:6306)\n    at Vw (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:73:19414)\n    at Io (file:///usr/lib/node_modules/@anthropic-ai/claude-code/cli.js:75:4280

Note: Error logs were truncated.

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