1! { dg-do run }
2! PR fortran/31188
3program foo_mod
4  implicit none
5  character (len=1), parameter :: letters(2) = (/"a","b"/)
6  call concat(1, [1])
7  call concat(2, [2])
8  call concat(3, [1,2])
9  call concat(4, [2,1])
10  call concat(5, [2,2,2])
11contains
12  subroutine concat(i, ivec)
13    integer, intent(in)  :: i, ivec(:)
14    write (*,*) i, "a" // letters(ivec)
15  end subroutine concat
16end program foo_mod
17! { dg-output " *1 aa(\n|\r\n|\r)" }
18! { dg-output " *2 ab(\n|\r\n|\r)" }
19! { dg-output " *3 aaab(\n|\r\n|\r)" }
20! { dg-output " *4 abaa(\n|\r\n|\r)" }
21! { dg-output " *5 ababab(\n|\r\n|\r)" }
22