https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78864
--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de>
---
Older versions give :
$ gfortran-7-20160828 z1.f90
z1.f90:5:16:
namelist /nml/ x
1
Error: NAMELIST object 'x' in namelist 'nml' at (1) is polymorphic and requires
a defined input/output procedure
z1.f90:4:16:
class(t) :: x
1
Error: CLASS variable 'x' at (1) must be dummy, allocatable or pointer
