[Bug fortran/122046] [14/15/16 Regression] ICE in is_illegal_recursion when a TBP is used to specify the bounds of a dummy argument

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122046

--- Comment #5 from anlauf at gcc dot gnu.org ---
(In reply to Jerry DeLisle from comment #4)
> Does this need to be back-ported?

Judging from comment#2 and the actual patch, fixing the 15-branch may make
sense.  Not sure if 14-branch is worth the effort/risk.