[Bug libfortran/59419] New: [4.9 Regression] Failing OPEN with FILE='xxx' and IOSTAT creates the file 'xxx' after revision 196783

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59419

            Bug ID: 59419
           Summary: [4.9 Regression] Failing OPEN with FILE='xxx' and
                    IOSTAT creates the file 'xxx' after revision 196783
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libfortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
                CC: jb at gcc dot gnu.org, tilo@tilo-schwarz.de

While the test 

open(unit=-10, file='xxx')
end

gives an error at run time without creating the file 'xxx'. The test

integer :: i
open(unit=-10, file='xxx', iostat=i)
print *, i
end

prints 5002 at run time and create an empty file 'xxx'. This does not happens
with r196783, but does with r196819.