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+! { dg-do compile }
+!
+! PR fortran/105381
+! Infinite recursion with array references of character dummy arguments.
+!
+! Contributed by Harald Anlauf <anlauf@gmx.de>
+
+MODULE m
+ implicit none
+ integer, parameter :: ncrit = 8
+ integer, parameter :: nterm = 7
+contains
+
+ subroutine new_thin_rule (rule1)
+ character(*),intent(in) ,optional :: rule1(ncrit)
+ character(len=8) :: rules (ncrit,nterm)
+ rules = ''
+ if (present (rule1)) rules(:,1) = rule1 ! <-- compile time hog
+ end subroutine new_thin_rule
+
+end module m