--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gfortran.dg/string_1_lp64.f90	Thu Oct 25 10:21:07 2018 +0900
@@ -0,0 +1,15 @@
+! { dg-do compile }
+! { dg-require-effective-target lp64 }
+! { dg-require-effective-target fortran_integer_16 }
+program main
+  implicit none
+  integer(kind=16), parameter :: l1 = 2_16**64_16
+  character (len=2_16**64_16+4_16), parameter :: s = "" ! { dg-error "too large" }
+  character (len=2_16**64_8+4_16) :: ch ! { dg-error "too large" }
+  character (len=l1 + 1_16) :: v ! { dg-error "too large" }
+  character (len=int(huge(0_8),kind=16) + 1_16) :: z ! { dg-error "too large" }
+  character (len=int(huge(0_8),kind=16) + 0_16) :: w
+
+  print *, len(s)
+
+end program main