2018-05-19  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/82923
	PR fortran/66694
	PR fortran/82617
	* trans-array.c (gfc_alloc_allocatable_for_assignment): Set the
	charlen backend_decl of the rhs expr to ss->info->string_length
	so that the value in the current scope is used.

2018-05-19  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/82923
	* gfortran.dg/allocate_assumed_charlen_4.f90: New test. Note
	that the patch fixes PR66694 & PR82617, although the testcases
	are not explicitly included.

From-SVN: r260392