[Bug fortran/82007] DTIO write format stored in a string leads to severe errors

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82007

--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Should I backport this to 7?

IMO yes.