Struct LastFailure 

pub struct LastFailure {
    pub step_id: StepId,
    pub step_ref: Option<String>,
    pub verdict_value: Value,
}

GH #76 error surface: single-slot breadcrumb the dispatcher writes when a step aborts the flow (currently: crate::core::state::DispatchOutcome::Blocked), so the surrounding crate::service::task_launch::TaskLaunchService::launch map_err closure can lift failed_step + verdict_value off the eval boundary into the structured crate::service::task_launch::TaskLaunchError::FlowEval variant. Sibling to step_entries (append-only per-step trace) — this slot is last-write-wins because only ONE aborting step matters for the eval’s terminal error envelope, and flow-ir stops dispatching further steps after EvalError::DispatcherError.

Fields

step_id: StepId

The StepId (dispatch-time tid) the dispatcher assigned to the aborting step.

step_ref: Option<String>

The Blueprint Step.ref that dispatched the aborting step, if known (dispatcher fills this from its own ref_ param — never None on the current write path, but modeled Option because the LastFailure shape is a public read surface and future breadcrumb writers may not have a ref in hand).

verdict_value: Value

The verdict value the aborting step carried (e.g. DispatchOutcome::Blocked(v)’s v, cloned by the dispatcher before mapping the outcome to EvalError::DispatcherError).

Trait Implementations

impl Clone for LastFailure

fn clone(&self) -> LastFailure

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LastFailure

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.