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Yogesh OjhaandClaude Opus 5
7460e4a1f4
A 2KB body nested a thousand deep returned 500. The request was correctly rejected — the traceback ends in RequestValidationError — but FastAPI then blew the stack building the 422 itself: its default error puts the offending value in `input`, and jsonable_encoder walks that value recursively. Every depth from about 990 up failed this way, until the JSON parser's own limit took over around twenty thousand and returned a clean 400. Errors are now reported as type, loc and msg, which is the shape FastAPI documents in HTTPValidationError and the only part the frontend reads. Dropping `input` removes the recursion and stops the API reflecting submitted values back in error bodies. Verified: depths 100 through 5000 all answer 422, messages and the loc path including its array index are unchanged, and a sweep of every write endpoint shows the same status distribution as before. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01K6LcH8uUddjJbKrahf34ys