[clang] Fix issue with FoldingSet and DependentTemplateSpecialization… (#150559)

…Type

PR #118288 fixed a re-entrancy issue with the usage of `FoldingSet` and
`AutoType`. The following test case (reduced with `creduce` by
@Fznamznon):

```
template <typename C, typename S1, int rbits>
typename C::A Bar(const S1& x, const C& c = C()) {
    using T = typename C::A;
    T result;

    using PreC = typename C::template boop<T::p + rbits>;
    using ExactC = typename C::template bap<PreC::p + 2>;

    using D = typename ExactC::A;

    return result;
}
```

shows a similar non-deterministic recursion with the use of `FoldingSet`
but with `DependentTemplateSepcializationType`. A nearly identical fix
is needed here too.

0 files changed, 0 insertions, 0 deletions