re PR libfortran/92100 (Formatted stream IO irreproducible read with binary data in file)

2019-11-24  Jerry DeLisle  <jvdelisle@gcc.ngu.org>

	PR fortran/92100
	gfortran.dg/streamio_18.f90: New test.

From-SVN: r278664

gcc/ChangeLog

+2019-11-24  Jerry DeLisle  <jvdelisle@gcc.ngu.org>
+
+	PR fortran/92100
+	gfortran.dg/streamio_18.f90: New test.
+
 2019-11-24  Bernd Schmidt  <bernds_cb1@t-online.de>
 
 	* config/i386/i386.c (ix86_rtx_costs): Handle care of a PLUS in a

gcc/testsuite/gfortran.dg/streamio_18.f90

+! { dg-do run }
+! PR91200
+program foo
+  implicit none
+  integer fd
+  open(newunit=fd, file='test.dat', access='stream', form='formatted')
+  write(fd,'(A)') '$MeshFormat'
+  write(fd,'(A)') 'aabbccdd'
+  close(fd)
+  call readfile  ! Read test.dat
+contains
+  subroutine readfile
+     character(len=20) buf1, buf2
+     integer fd, m, n
+     open(newunit=fd, file='test.dat', access='stream', form='formatted')
+     inquire(fd, pos=m)
+     if (m /= 1) stop 'm /= 1'
+     read(fd, *) buf1
+     read(fd, *, pos=m) buf2        ! Reread by using pos=1
+     close(fd, status='delete')
+     if (buf1 /= buf2) stop 'wrong'
+  end subroutine readfile
+end program