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! { dg-do run }
! Test the fix for PR26891, in which an optional argument, whose actual
! is a missing dummy argument would cause a segfault.
!
! Contributed by Paul Thomas <pault@gcc.gnu.org>
!
logical :: back =.false.
! This was the case that would fail - PR case was an intrinsic call.
if (scan ("A quick brown fox jumps over the lazy dog", "lazy", back) &
.ne. myscan ("A quick brown fox jumps over the lazy dog", "lazy")) &
call abort ()
! Check that the patch works with non-intrinsic functions.
if (myscan ("A quick brown fox jumps over the lazy dog", "fox", back) &
.ne. thyscan ("A quick brown fox jumps over the lazy dog", "fox")) &
call abort ()
! Check that missing, optional character actual arguments are OK.
if (scan ("A quick brown fox jumps over the lazy dog", "over", back) &
.ne. thyscan ("A quick brown fox jumps over the lazy dog")) &
call abort ()
contains
integer function myscan (str, substr, back)
character(*), intent(in) :: str, substr
logical, optional, intent(in) :: back
myscan = scan (str, substr, back)
end function myscan
integer function thyscan (str, substr, back)
character(*), intent(in) :: str
character(*), optional, intent(in) :: substr
logical, optional, intent(in) :: back
thyscan = isscan (str, substr, back)
end function thyscan
integer function isscan (str, substr, back)
character(*), intent(in) :: str
character(*), optional :: substr
logical, optional, intent(in) :: back
if (.not.present(substr)) then
isscan = myscan (str, "over", back)
else
isscan = myscan (str, substr, back)
end if
end function isscan
end
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