Enum SkipCause 

pub enum SkipCause {
    UpstreamFailed {
        upstream: TaskId,
    },
    UpstreamErrored {
        upstream: TaskId,
    },
    RuntimeCycle,
}

Reason a task was cascade-skipped per EXEC-011.

The upstream field on each variant carries the root failing task identity, not the immediate hard predecessor: when A fails and the cascade marks B (direct hard child) and C (hard child of B), both record upstream = A.

Variants

UpstreamFailed

A transitively-upstream task reached RunState::Failed (per EXEC-009: non-zero exit, non-executor signal, or executor-imposed timeout).

Fields

upstream: TaskId

Identity of the originally-failed upstream task.

UpstreamErrored

A transitively-upstream task surfaced a RunTaskError (executor-level failure: cache derive, spawn, wait, stream-read, output-resolution, or store). Distinct from Self::UpstreamFailed so the run summary can tell “the upstream task ran and failed” from “the executor could not even run the upstream task”.

Fields

upstream: TaskId

Identity of the upstream task whose run_task call returned an Err.

RuntimeCycle

The task was identified as a member of a runtime cycle detected by EXEC-019. The scheduler stops admitting further tasks once the cycle is observed; cycle members still in the ready set never start. The cycle’s full node set and the offending edge appear in the run’s crate::run_graph::RunGraphOutcome::invariant_violations diagnostic; this per-task cause attributes the skip to that workspace-level event without rewriting the cycle node’s outcome to a misleading “failed” classification.

Trait Implementations

impl Clone for SkipCause

fn clone(&self) -> SkipCause

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SkipCause

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

Formats the value using the given formatter.

impl PartialEq for SkipCause

fn eq(&self, other: &SkipCause) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for SkipCause

impl StructuralPartialEq for SkipCause