[Bug fortran/28039] New: Warn when ignoring extra characters in the format specification

["tobias dot burnus at physik dot fu-berlin dot de" <gcc-bugzilla at gcc dot gnu dot org>]

Assume the following case:

One had somewhere '(3(a,....),f)', now one copies this and realizes that one
does not need the 3(..) anymore. Result:
'(a,....),f)'
Ups, the ",f)" is ignored.

Currently, gfortran does not warn in such a case.

Expected: gfortran warns at compile time

Ifort (9.1) even default warns in such a case:
fortcom: Warning: test.f90, line 5: The extra characters in the format
specification will be ignored   ['(a),f)']
  write(*,'(a),f)') 'Hello', r
--------------^

Test case:
--------------
program test
  implicit none
  real :: r
  r = 1.0
  write(*,'(a),f)') 'Hello', r
end program test
--------------


-- 
           Summary: Warn when ignoring extra characters in the format
                    specification
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tobias dot burnus at physik dot fu-berlin dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28039