re PR libfortran/25139 ("Invalid argument" error on I/O)

2005-12-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libgfortran/25139
	* gfortran.dg/backspace_2.f: New test.

From-SVN: r109123

gcc/testsuite/ChangeLog

 2005-12-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
+	PR libgfortran/25139
+	* gfortran.dg/backspace_2.f: New test.
+
+2005-12-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
 	PR libgfortran/25550
 	* gfortran.dg/endfile.f: New test.
 

gcc/testsuite/gfortran.dg/backspace_2.f

+! { dg-do run }
+! PR25139 Repeated backspaces and reads.
+! Derived from example given in PR by Dale Ranta and FX Coudert
+! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org> 
+      integer dat(5)
+      dat = (/ 0, 0, 0, 0, 1 /)
+      write(11) dat,dat,dat,dat
+      rewind 11
+      write(11) dat
+      read(11,end=1008) dat
+      call abort()
+ 1008 continue
+      backspace 11
+      write(11) dat
+      read(11,end=1011) dat
+      call abort()
+ 1011 continue
+      backspace 11
+      backspace 11
+      end
+