openai/codex · error · anyhow::Error

terminal operation {operation_id} disappeared during observa

Error message

terminal operation {operation_id} disappeared during observation linking

What it means

Error "terminal operation {operation_id} disappeared during observation linking" thrown in openai/codex.

Source

Thrown at codex-rs/rollout-trace/src/reducer/tool/terminal.rs:297

    /// and output item ids let viewers jump between transcript and terminal timelines.
    pub(in crate::reducer) fn sync_terminal_model_observation(
        &mut self,
        tool_call_id: &str,
    ) -> Result<()> {
        let Some(tool_call) = self.rollout.tool_calls.get(tool_call_id) else {
            bail!("tool call {tool_call_id} disappeared during terminal observation linking");
        };
        let Some(operation_id) = tool_call.terminal_operation_id.clone() else {
            return Ok(());
        };
        let call_item_ids = tool_call.model_visible_call_item_ids.clone();
        let output_item_ids = tool_call.model_visible_output_item_ids.clone();
        if call_item_ids.is_empty() && output_item_ids.is_empty() {
            return Ok(());
        }

        let Some(operation) = self.rollout.terminal_operations.get_mut(&operation_id) else {
            bail!("terminal operation {operation_id} disappeared during observation linking");
        };
        // A terminal result and a model-visible tool output are intentionally
        // separate: the former is what the runtime saw, the latter is what later
        // inference payloads prove was shown back to the model.
        if let Some(observation) = operation
            .model_observations
            .iter_mut()
            .find(|observation| observation.source == TerminalObservationSource::DirectToolCall)
        {
            observation.call_item_ids = call_item_ids;
            observation.output_item_ids = output_item_ids;
        } else {
            operation.model_observations.push(TerminalModelObservation {
                call_item_ids,
                output_item_ids,
                source: TerminalObservationSource::DirectToolCall,
            });
        }

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/rollout-trace/src/reducer/tool/terminal.rs:297 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/b9440440e836a398. Report an issue: GitHub.