2017-11-13  Fritz Reese <fritzoreese@gmail.com>

    PR fortran/78240

    gcc/fortran/ChangeLog:

	PR fortran/78240
	* decl.c (match_clist_expr): Replace gcc_assert with proper
	handling of bad result from spec_size().
	* resolve.c (check_data_variable): Avoid NULL dereference when passing
	locus to gfc_error.

    gcc/testsuite/ChangeLog:

	PR fortran/78240
	* gfortran.dg/dec_structure_23.f90: New.
	* gfortran.dg/pr78240.f90: New.

From-SVN: r254718