schedule_cleanup.md

---

title: "Schedule cleanup"
pull_requests: [21608]

---

• ScheduleGraph::topsort_graph has been moved to DiGraph::toposort.

• ReportCycles was removed: instead, DiGraphToposortErrors should be immediately wrapped into hierarchy graph or dependency graph ScheduleBuildError variants.

• ScheduleBuildError::HierarchyLoop variant was removed, use ScheduleBuildError::HierarchySort(DiGraphToposortError::Loop()) instead.

• ScheduleBuildError::HierarchyCycle variant was removed, use ScheduleBuildError::HierarchySort(DiGraphToposortError::Cycle()) instead.

• ScheduleBuildError::DependencyLoop variant was removed, use ScheduleBuildError::DependencySort(DiGraphToposortError::Loop()) instead.

• ScheduleBuildError::DependencyCycle variant was removed, use ScheduleBuildError::DependencySort(DiGraphToposortError::Cycle()) instead.

• simple_cycles_in_component has been changed from a free function into a method on DiGraph.