--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gfortran.dg/whole_file_17.f90	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,22 @@
+! { dg-do compile }
+! { dg-options "-pedantic -fwhole-file" }
+!
+! PR fortran/30668
+!
+
+integer(8) function two()
+  two = 2
+end function two
+
+CHARACTER(len=8) function string()
+  string = "gfortran"
+end function string
+
+
+program xx
+  INTEGER :: a
+  CHARACTER(len=4) :: s, string   ! { dg-error "Character length mismatch" }
+
+  a = two()                       ! { dg-error "Return type mismatch" }
+  s = string()
+end program xx