[Bug fortran/41093] New: memory leaks with gfc_namespace

["janus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

It seems that there is something wrong in the reference counting for
namespaces, especially (only?) for the formal_ns of procedures. This was
noticed when working on PR 40877 (memory leaks with gfc_charlen). E.g. in
bounds_check_strlen_8.f90, the formal_ns of 'F1' is never freed up.

Reduced example:

 FUNCTION F1(a,b,c,d) RESULT(RES)
   CHARACTER(LEN=80), OPTIONAL :: a,b,c,d
   LOGICAL :: res
 END FUNCTION F1

When compiling this, gfc_free_namespace is called just once for the formal_ns
of 'F1', but ns->refs is 3, so it is never freed.


-- 
           Summary: memory leaks with gfc_namespace
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41093