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Sort indexes during graph edge removal (#4649)

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## Summary

`remove_edge` will invalidate the last index in the graph, so we need to
ensure that each index we look at is "earlier" than the last.

Co-authored-by: bluss <bluss@users.noreply.github.com>
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Charlie Marsh 2024-06-29 13:31:54 -04:00 • committed by GitHub
parent ea6185e082
commit 8d9b4a5e1c
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5
crates/uv-resolver/src/resolution/display.rs
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@ -360,11 +360,12 @@ fn propagate_markers(mut graph: IntermediatePetGraph) -> IntermediatePetGraph {
// TODO(charlie): The above reasoning could be incorrect. Consider using a graph algorithm that
// can handle weight propagation with cycles.
let edges = {
let fas = greedy_feedback_arc_set(&graph)
let mut fas = greedy_feedback_arc_set(&graph)
.map(|edge| edge.id())
.collect::<Vec<_>>();
fas.sort_unstable();
let mut edges = Vec::with_capacity(fas.len());
for edge_id in fas {
for edge_id in fas.into_iter().rev() {
edges.push(graph.edge_endpoints(edge_id).unwrap());
graph.remove_edge(edge_id);
}