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! { dg-do run }

! { dg-options "-std=gnu -pedantic -ffree-line-length-none" }

! Test the GNU extension of a L format descriptor without width

! PR libfortran/21303

program test_l

  logical(kind=1) :: l1

  logical(kind=2) :: l2

  logical(kind=4) :: l4

  logical(kind=8) :: l8

  character(len=20) :: str

  l1 = .true.

  write (str,"(L)") l1 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  read (str,"(L)") l1 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  if (l1 .neqv. .true.) call abort

  l2 = .true.

  write (str,"(L)") l2 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  read (str,"(L)") l2 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  if (l2 .neqv. .true.) call abort

  l4 = .true.

  write (str,"(L)") l4 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  read (str,"(L)") l4 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  if (l4 .neqv. .true.) call abort

  l8 = .true.

  write (str,"(L)") l8 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  read (str,"(L)") l8 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  if (l8 .neqv. .true.) call abort

  l1 = .false.

  write (str,"(L)") l1 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  read (str,"(L)") l1 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  if (l1 .neqv. .false.) call abort

  l2 = .false.

  write (str,"(L)") l2 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  read (str,"(L)") l2 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  if (l2 .neqv. .false.) call abort

  l4 = .false.

  write (str,"(L)") l4 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  read (str,"(L)") l4 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  if (l4 .neqv. .false.) call abort

  l8 = .false.

  write (str,"(L)") l8 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  read (str,"(L)") l8 ! { dg-warning "Extension: Missing positive width after L descriptor" }

  if (l8 .neqv. .false.) call abort

end program test_l

! { dg-output "At line 14 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 15 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 19 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 20 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 24 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 25 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 29 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 30 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 34 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 35 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 39 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 40 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 44 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 45 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 49 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }

! { dg-output "At line 50 of file.*" }

! { dg-output "Fortran runtime warning: Positive width required in format\n" }