chore(deps): bump guppy from 0.17.25 to 0.17.26

[dependabot]

Bumps guppy from 0.17.25 to 0.17.26.

Release notes

Sourced from guppy's releases.

guppy 0.17.26

Fixed

A node with a self-loop edge -- typically a package with a path dev-dependency on its own crate, or a feature node like base/[base] arising from one -- was treated inconsistently by several APIs. The root cause was that self-edges were counted as incoming edges in the SCC and topological-sort machinery, which transitively confused everything built on top:

• Sccs::externals / forward roots. Previously, a package whose only incoming edge was its own self-loop was excluded from the set of forward roots, so callers iterating over query_workspace().resolve().root_ids(_) did not see it, and forward link enumeration on it was broken. Now, self-loop edges no longer disqualify a node from being a forward root: a single-node SCC is external iff it has no incoming edges from outside its own SCC. (#586)
• Topological sort. Previously, TopoWithCycles::new filtered self-looping nodes out of its root set for the same reason, dropping them from the DFS and then placing them and their descendants at the end of the topological order via a best-effort fallback. Now, the root-set predicate accepts a node whose only incoming edge is its own self-loop, so such nodes are visited in DFS order alongside other roots. (#589)
• Cycles::is_cyclic and feature::Cycles::is_cyclic. Previously, these were reflexively true for every package or feature, regardless of actual cycle membership. Now, they return true only when the argument lies on a directed cycle: either in a multi-node SCC, or in a single-node SCC with a self-loop edge. This is a behavior change, but in the context of the rest of this release is being treated as a bugfix. (#590)
• Cycles::all_cycles and feature::Cycles::all_cycles. Previously, these reported only SCCs of two or more elements. Now, they also yield single-node SCCs whose node has a self-loop edge, in topological order alongside multi-node SCCs. This makes all_cycles() and is_cyclic(x, x) agree on what counts as a cycle. (#590)
• FeatureGraphWarning::SelfLoop. Previously, this warning was emitted for every self-loop edge in the feature graph, including legitimate ones such as a path dev-dependency on the package's own crate. Now, it is restricted to named-feature self-loops like [features] a = ["a"], which really are user errors. (#592)

Documentation

• PackageGraph::directly_depends_on and FeatureGraph::directly_depends_on. Previously, both documented themselves as returning false when the two IDs were equal. The implementation has always called dep_graph.contains_edge(a, b), which correctly returns true for self-loop edges, so the

... (truncated)

Commits

• 3f7c2dd [guppy] version 0.17.26
• bc1c151 [target-spec-miette] version 0.4.8
• b6dd690 set up pre-release replacements
• e660e26 [target-spec-miette] version 0.4.7
• fa2f007 [guppy] speed up graph test compilation (#596)
• cc8d141 [guppy] more fixes for self-loop cycles (#595)
• ac01af6 [guppy] update some doc comments
• 28ac5b5 [guppy] gate proptest_summary_id_roundtrip on the summaries feature (#594)
• 9a6d61f [guppy] assert topo fallback invariant and add multi-node-cycle test (#593)
• e2c63a3 [guppy] restrict FeatureGraphWarning::SelfLoop to named-feature edges (#592)
• Additional commits viewable in compare view

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