A chart disconnect can leave its context endpoint returning over a closed channel. Exercise the real `_rpc._invoke()` dispatcher with loopback TCP and a sibling service to isolate the resulting `TransportClosed` nursery cancellation. Deats, - Order caller close, callee EOF and endpoint completion with events instead of timing sleeps or injected transport errors. - Keep an ordinary-RPC control for existing response hardening. - Capture the collateral task, actor/PID, nursery, cancel scope and cancellation source in a test-generated exception note. - Record the live IB diagnosis and generated-test provenance. The ordinary-RPC control passes; the context case remains red with `ClosedResourceError` wrapped as `TransportClosed`. This commit establishes the regression before runtime remediation. Prompt-IO: ai/prompt-io/20261019T140536Z_9a0f220f_final_return_prompt_io.md (this patch was generated in some part by `opencode` using `gpt-6.1-sol` (`openai`)) |
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