[Bug fortran/71935] [4.9/5/6/7 Regression] ICE is_c_interoperable(): gfc_simplify_expr failed

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71935

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Likely r197053.