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Rust: Fix bad join #20164

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Merged
merged 1 commit into from
Aug 5, 2025
+14 −9
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Rust: Fix bad join #20164

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23 changes: 14 additions & 9 deletions rust/ql/lib/codeql/rust/internal/PathResolution.qll
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Original file line number Diff line number Diff line change
Expand Up @@ -1464,6 +1464,18 @@ private predicate externCrateEdge(ExternCrateItemNode ec, string name, CrateItem
)
}

pragma[nomagic]
private predicate preludeItem(string name, ItemNode i) {
exists(Crate stdOrCore, ModuleLikeNode mod, ModuleItemNode prelude, ModuleItemNode rust |
stdOrCore.getName() = ["std", "core"] and
mod = stdOrCore.getSourceFile() and
prelude = mod.getASuccessorRec("prelude") and
rust = prelude.getASuccessorRec(["rust_2015", "rust_2018", "rust_2021", "rust_2024"]) and
i = rust.getASuccessorRec(name) and
not i instanceof Use
)
}

/**
* Holds if `i` is available inside `f` because it is reexported in
* [the `core` prelude][1] or [the `std` prelude][2].
Expand All @@ -1476,15 +1488,8 @@ private predicate externCrateEdge(ExternCrateItemNode ec, string name, CrateItem
*/
pragma[nomagic]
private predicate preludeEdge(SourceFile f, string name, ItemNode i) {
not declares(f, _, name) and
exists(Crate stdOrCore, ModuleLikeNode mod, ModuleItemNode prelude, ModuleItemNode rust |
stdOrCore.getName() = ["std", "core"] and
mod = stdOrCore.getSourceFile() and
prelude = mod.getASuccessorRec("prelude") and
rust = prelude.getASuccessorRec(["rust_2015", "rust_2018", "rust_2021", "rust_2024"]) and
i = rust.getASuccessorRec(name) and
not i instanceof Use
)
preludeItem(name, i) and
not declares(f, _, name)
}

pragma[nomagic]
Expand Down