[Bug fortran/127631] rnflow hangs with higher optimiztaion

[tkoenig at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127631

--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 65699
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65699&action=edit
main source file