[Bug fortran/45629] New: libgfortran/io/list_read.c:1872:10: warning: variable 'elem' might be clobbered by 'longjmp' or 'vfork' [-Wclobbered]

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

At least on MinGW64 (as reported by nightstrike), the following warning is
printed when compiling libgfortran:

libgfortran/io/list_read.c:1872:10: warning: variable 'elem' might be clobbered
by 'longjmp' or 'vfork' [-Wclobbered]

If one looks at the source, one sees:

  1869  list_formatted_read (st_parameter_dt *dtp, bt type, void *p, int kind,
  1870                       size_t size, size_t nelems)
  1871  {
  1872    size_t elem;
[...]
  1880    for (elem = 0; elem < nelems; elem++)
  1881      {
  1882        dtp->u.p.item_count++;
  1883        list_formatted_read_scalar (dtp, type, tmp + stride*elem, kind,
size);


with
  1704  list_formatted_read_scalar (st_parameter_dt *dtp, volatile bt type,
void *p,
  1710    jmp_buf eof_jump;

However, I do not see how "elem" itself gets clobbered - thus the warning looks
bogus to me, but I have only glanced at the code.


-- 
           Summary: libgfortran/io/list_read.c:1872:10: warning: variable
                    'elem' might be clobbered by 'longjmp' or 'vfork' [-
                    Wclobbered]
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45629