[Bug fortran/104819] Reject NULL without MOLD as actual to an assumed-rank dummy

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104819

--- Comment #20 from anlauf at gcc dot gnu.org ---
Still missing:

- handling of CLASS/unlimited polyporphic assumed-rank dummies
- tightening of checks according to F2008/F2018
- fix testsuite fallout due to some invalid testcases (see comment#7)