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Rust: Suppress type inference inconsistency that can be explained by path resolution

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Simon Friis Vindum
2025-09-03 12:53:30 +02:00
parent de8e535c3a
commit e610465ee8
1 changed files with 7 additions and 1 deletions
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8
rust/ql/lib/codeql/rust/internal/TypeInference.qll
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@@ -226,7 +226,13 @@ module Consistency {
predicate nonUniqueCertainType(AstNode n, TypePath path, Type t) {
strictcount(CertainTypeInference::inferCertainType(n, path)) > 1 and
t = CertainTypeInference::inferCertainType(n, path)
t = CertainTypeInference::inferCertainType(n, path) and
// Suppress the inconsistency if `n` is a self parameter and the type
// mention for the self type has multiple types for a path.
not exists(ImplItemNode impl, TypePath path0 |
n = impl.getAnAssocItem().(Function).getParamList().getSelfParam() and
strictcount(impl.(Impl).getSelfTy().(TypeMention).resolveTypeAt(path0)) > 1
)
}
}