[Bug c++/86291] OpenMP incorrect for-loop collapsing with iterators and at least 5 nested loops

[bonjour at matteodelabre dot me]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86291

--- Comment #7 from Mattéo Delabre <bonjour at matteodelabre dot me> ---
Can confirm the fix works for my use case. Thanks!