[Bug fortran/34721] New: Output statements fool the -Wuninitialized option

["dominiq at lps dot ens dot fr" <gcc-bugzilla@gcc.gnu.org>]

The following code

subroutine test(a, b, x)
integer :: i, n
real :: a, b, x(:)
if (a==b) n=size(x)
print *, n
do i=1,n
 x(i)=n
end do
end

does not give any warning when compiled with 'gfortran -c -O -Wuninitialized'
even if I comment the "if" line. If I comment the "print" line (with or without
the "if" one) I get

[ibook-dhum] source/bug% gfc -c -O -Wuninitialized test_uninit.f90
test_uninit.f90: In function 'test':
test_uninit.f90:2: warning: 'n' may be used uninitialized in this function
test_uninit.f90:2: note: 'n' was declared here

as expected.


-- 
           Summary: Output statements fool the -Wuninitialized option
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dominiq at lps dot ens dot fr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34721