[Bug fortran/80304] [7 Regression] Wrong result with do concurrent

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80304

--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Can you narrow it down further?

Not trivial!-(