[Bug fortran/87734] [7/8/9 Regression] ICE in is_illegal_recursion check for character len= parameter

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87734

--- Comment #11 from janus at gcc dot gnu.org ---
(In reply to janus from comment #10)
> You mean r267793. Yes, that's certainly what fixed the ICE.

Since it fixes a regression (ICE-on-invalid in PR 88376, ICE-on-valid here), it
should ideally be backported to the 7 and 8 branches ...