[Bug] Anthropic API Error: 400 Tool Use Concurrency Issue

Resolved 💬 3 comments Opened Dec 12, 2025 by rjcorwin Closed Dec 16, 2025

Bug Description
When using teleport, when I submit a message I get: API Error: 400 due to tool use concurrency issues. Run /rewind to recover the
conversation.

Environment Info

  • Platform: darwin
  • Terminal: vscode
  • Version: 2.0.65
  • Feedback ID: e4346081-301a-42c6-ba95-283520654fff

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/rj/.local/share/claude/versions/2.0.65 (expected in multi-process scenarios)\n    at fjB (/$bunfs/root/claude:2597:1618)\n    at ZAA (/$bunfs/root/claude:2597:1296)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-12T14:01:33.743Z"},{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/rj/.local/share/claude/versions/2.0.61 (expected in multi-process scenarios)\n    at fjB (/$bunfs/root/claude:2597:1618)\n    at XAA (/$bunfs/root/claude:2595:35624)\n    at async LAA (/$bunfs/root/claude:2597:3428)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-12T14:01:33.778Z"},{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/rj/.local/share/claude/versions/2.0.57 (expected in multi-process scenarios)\n    at fjB (/$bunfs/root/claude:2597:1618)\n    at XAA (/$bunfs/root/claude:2595:35624)\n    at async LAA (/$bunfs/root/claude:2597:3428)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-12T14:01:33.779Z"},{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/rj/.local/share/claude/versions/2.0.67 (expected in multi-process scenarios)\n    at fjB (/$bunfs/root/claude:2597:1618)\n    at XAA (/$bunfs/root/claude:2595:35624)\n    at async LAA (/$bunfs/root/claude:2597:3428)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-12T14:01:33.786Z"},{"error":"Error: Failed to fetch from remote origin: fatal: refusing to fetch into branch 'refs/heads/claude/load-game-world-start-menu-017nrqBPPyMNww7CCycyTUzw' checked out at '/Users/rj/Git/rjcorwin/seacat'\n    at lyD (/$bunfs/root/claude:1836:352)\n    at async eLT (/$bunfs/root/claude:1837:302)\n    at async <anonymous> (/$bunfs/root/claude:4616:51)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-12T14:01:35.463Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.2: `tool_use` ids were found without `tool_result` blocks immediately after: toolu_01T1zJxRup3mEgvDv8SJPUEQ. Each `tool_use` block must have a corresponding `tool_result` block in the next message.\"},\"request_id\":\"req_011CW2v4WTCXK1Q6KQEuY24g\"}\n    at generate (/$bunfs/root/claude:125:10428)\n    at makeRequest (/$bunfs/root/claude:814:5434)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-12T14:01:41.447Z"},{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/rj/.local/share/claude/versions/2.0.67 (expected in multi-process scenarios)\n    at fjB (/$bunfs/root/claude:2597:1618)\n    at XAA (/$bunfs/root/claude:2595:35624)\n    at async DdD (/$bunfs/root/claude:2595:37725)\n    at async cj (/$bunfs/root/claude:2597:236)\n    at async <anonymous> (/$bunfs/root/claude:2597:13006)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-12T14:01:42.803Z"}]

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