Fortran : ICE in gfc_conv_array_constructor_expr PR93497

Fortran  : ICE in gfc_conv_array_constructor_expr PR93497

Invalid expressions, such as those involving array constructors,
used for the length of character types will cause an ICE.

2020-05-11  Mark Eggleston  <markeggleston@gcc.gnu.org>

Backported from master
2020-05-13  Steven G. Kargl  <kargl@gcc.gnu.org>

gcc/fortran/

	PR fortran/93497
	* decl.c (char_len_param_value): Check whether character
	length expression is of type EXPR_OP and if so simplify it.
	* resolve.c (resolve_charlen): Reject length if it has a
	rank.

2020-05-11  Mark Eggleston  <markeggleston@gcc.gnu.org>

Backported from master
2020-05-13  Mark Eggleston  <markeggleston@gcc.gnu.org>

gcc/testsuite/

	PR fortran/93497
	* gfortran.dg/pr88025.f90: Change in wording of error.
	* gfortran.dg/pr93497.f90: New test.
	* gfortran.dg/pr93714_1.f90: Change in wording of errors.
	* gfortran.dg/pr93714_2.f90: Change in wording of errors.