2011-12-05  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/51338
	* dependency.c (are_identical_variables):  Handle case where
	end fields of substring references are NULL.

2011-12-05  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/51338
	* gfortran.dg/assumed_charlen_substring_1.f90:  New test.

From-SVN: r182024