[Bug fortran/18561] New: IF (logical ) IF (arith) lab1 , lab 2 lab 3 is unclassifiable

["paul dot richard dot thomas at cea dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

Encountered in LLNL DLSODES.F - execreable stuff, obsolete too, but accepted by 
other brands.  The fix is easy and looks cleaner.

IS THIS A BUG OR AN ABOMINATION?

	program ifif_test
           integer     i , j 
	   i = 1
	   j = 2
           if ( i.EQ.1 ) if ( j -2 ) 10 , 20 , 30
 10	   PRINT *, 'thuuunk! j<2'
           stop 
 20	   print *, 'Hello 1,2 world'
	   STOP
 30       PRINT *, 'uuurkk! j>2'
	end program ifif_test

$ /irun/bin/gfortran -x f77 ifif_test.f90
 In file ifif_test.f90:5

           if ( i.EQ.1 ) if ( j -2 ) 10 , 20 , 30
                        1
Error: Unclassifiable statement in IF-clause at (1)

-- 
           Summary: IF (logical ) IF (arith) lab1 , lab 2 lab 3   is
                    unclassifiable
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: paul dot richard dot thomas at cea dot fr
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18561