Simple patch only add assumed-rank to the list of possible attributes.
gcc/fortran/ChangeLog:
2020-06-03 José Rui Faustino de Sousa <jrfsousa@gmail.com>
PR fortran/95214
PR fortran/66833
PR fortran/67938
* trans-expr.c (gfc_maybe_dereference_var): Add assumed-rank to
character dummy arguments list of possible attributes.
gcc/testsuite/ChangeLog:
2020-06-03 José Rui Faustino de Sousa <jrfsousa@gmail.com>
PR fortran/95214
PR fortran/66833
PR fortran/67938
* gfortran.dg/PR95214.f90: New test.