[Bug fortran/29459] New: Spurious warning about uninitialized optional arguments

[vivekrao4 at yahoo dot com]

gfortran -c -Wall -O1 gfort_warnings.f90 

using gcc version 4.2.0 20061011 (experimental) on Windows XP

for the code

module foo_mod
implicit none
contains
subroutine print_sub(fmt_acf,iu,labels)
character (len=*), intent(in), optional :: fmt_acf
integer          , intent(in), optional :: iu
character (len=*), intent(in), optional :: labels(:)
if (present(iu)) then
   print*,iu
end if
if (present(fmt_acf)) then
   print*,fmt_acf
end if
if (present(labels)) then
   write (*,*) labels
end if
end subroutine print_sub
!
end module foo_mod

produces the spurious warnings
gfort_warnings.f90: In function 'print_sub':
gfort_warnings.f90:4: warning: 'stride.1' may be used uninitialized in this
function
gfort_warnings.f90:4: warning: 'ubound.0' may be used uninitialized in this
function
gfort_warnings.f90:4: warning: 'labels.0' may be used uninitialized in this
function
gfort_warnings.f90:4: warning: '<anonymous>' may be used uninitialized in this
function


-- 
           Summary: Spurious warning about uninitialized optional arguments
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: vivekrao4 at yahoo dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29459