[Bug fortran/90290] -std=f2008 should reject non-constant stop and error stop codes

[thenlich+gccbug at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90290

--- Comment #2 from Thomas Henlich <thenlich+gccbug at gmail dot com> ---
The road to standards non-compliance hell is paved with very minor offenses...
;-)