openai/codex · error · anyhow::Error

tool call {tool_call_id} disappeared during terminal observa

Error message

tool call {tool_call_id} disappeared during terminal observation linking

What it means

Error "tool call {tool_call_id} disappeared during terminal observation linking" thrown in openai/codex.

Source

Thrown at codex-rs/rollout-trace/src/reducer/tool/terminal.rs:285

            bail!(
                "terminal session {terminal_id} belongs to thread {}, not {thread_id}",
                session.thread_id
            );
        }
        push_unique(&mut session.operation_ids, operation_id);
        Ok(())
    }

    /// Mirrors model-visible tool items onto the terminal observation view.
    ///
    /// Runtime terminal rows are useful on their own, but the model-visible call
    /// 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

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/rollout-trace/src/reducer/tool/terminal.rs:285 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/454f32302f26dda2. Report an issue: GitHub.